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Earth-1, Barry and Caitlin are in the middle of a crucial time. Barry is carefully taking a piece of foldable cloth while Caitlin guides him through this. "Careful." She tells him as he's being as careful as he possibly could. "This is a critical time." She states as Barry wipes something on the table clean and grabs the cloth again. "Steady hands." Caitlin says, as she keeps guiding him as Barry seems to have failed.

"Call time and death." Barry tells her while looking at their three day old son, Brett, who's just laughing at his parents as Barry has failed once again at changing his diaper when they hear crying from their three day old daughter, Bree, and Caitlin goes to check on her.

It's been two years since Barry and Caitlin were married and the failed Invasion of Earth-X, and a year after Caitlin learned she was pregnant with the twins. It's also been half a year since Earth-616 Elseworlds and the Avengers run in with the Monitor, but they never got the chance to explain that to team Flash. What they didn't know was today was the day everything changed.

Barry suddenly gets a alert on his phone of a huge energy surge just a few blocks away from him and sees Brett is still alone so he places him into his crib and rushes to get his suit and make it to the location.

-

Once he reaches it, he watches lightning blast everywhere and for a second, he thought it was the Speedforce again, when a man suddenly appears in the streets. He seemed to be half man, half machine like Bucky with the robot arm and even his eye. His suit looks like it was dragged trough everything and back and also noticed he has a dirty teddy bear strapped to his belt. "It's only the beginning." The man says and Barry is completely confused to who this guy is.

"Who the hell are you?" Barry asks while walking closer towards the man as the man does the same. "The names Cable. I'm from the future." This supposed Cable explains to Barry when he noticed his weapon he has. "What's with the gun?" Barry questions the man.

"I'm here to help in the Crisis." Cable explains why he's here and Barry remembers the Monitor warning them of a crisis coming. "What's going to happen?" Barry asks, trying to finally get answers of what is going to happen.

"I need to get to Earth-616 first. I need to warn the Avengers. I know how to stop the end of day." Cable explains to Barry and that means he needs Cisco.

-

Earth-616.

The Avengers were working non stop to try and stop the crisis they were warned about late year. "Is everything in motion, Strange?" Peter asks his sorcerer friend, they've been tracking this antimatter wave that seems to have been heading their way, except it seems to be killing off universe at random so they can't predict where it's going to be.

"I did exactly as you asked. Are you sure about this though?" Strange asks the team leader since this plan seems to be a little far fetched to work. "If it's the end of the multiverse, were gonna need to do whatever it takes to protect our home." Peter explains when a breach opens and they look to see Harrison "Harry" Wells and his daughter, Jesse.

"Who the hell is this?" Natasha asks since they were never really introduced. "Harry?" Peter asks seeing his Earth-1 friend. "Parker. Thank god it's you." Harry states seeing the arachnid hero.

"What happened?" Strange asks, since he doesn't see why they're here. "Earth-2, it was just destroyed by a wave of antimatter." Jesse explains and Strange uses his powers to show the map of all 653 universes and that means there's already 8 universes dead.

"Is it coming? Is this it?" Peter hears one of the Avengers ask, and he doesn't know how to answer it. "It's not coming. It's already here." Strange informs the heroes when another breach opens and Cisco appears with someone.

"Cisco. Who's you friend?" Scott asks the man seeing them both. "He says he belongs to you." Cisco replies jokingly.

"The names Cable. I'm from the future. I need your help in stopping the Crisis from destroying the entire multiverse." Cable explains to the heroes who don't believe him since he looks like he's here from a war zone.

"I've traveled from 20 years in the future from the quantum universe to get here to help you, and I know I can't bring down the Anti-Monitor alone." Cable explains and that gets everyone more confused since they never heard of the Anti-Monitor.

"We don't have a lot of time, your friends from across the multiverse are already being assembled to fight against the end of Earth-38." Cable warns them and that gets some Avengers confused, but some understand. "Supergirl's world?" Peter asks him.

"What do you know?" MJ asks the man hoping he can help them.

"Here's a bigger question, if you could travel back in time, why not travel back even further and warn us even earlier than when half a dozen worlds have already been destroyed? Or even better yet, go even further back, and kill the baby Anti-Monitor." Daisy wonders since that seems like a better solution.

"We've been using a device to slide through time. The longer we travel back, the more power it consumes to work. We have only one Pym particle, one was all it takes to get me here." Cable explains and his wording caught Peter's attention.

"Did you say "we"?" Peter asks the Time Traveler's Husband. "How many people were sent back?" He wonders happy to hear more than one person survived.

"I didn't mean like that, I meant the other attempts." Cable explains and that means that this Cable isn't the first one to travel back in time.

"Every time we tried saving the multiverse, we fail the same way with almost the same results. Worlds burn to the ground, and that said ground vanishes. This would be our 235th attempt, it has always ended the same way so far. The Avengers, and the heroes everywhere, team up to stop the threat, the threat destroys everything in its path. Send back someone for a do over. Every time it's always someone else. Steve Rodgers, Tony Stark, Caitlin Snow, everyone. And every time we fail, it gets recorded so the next timeline can learn from the mistakes." Cable explains and reaches for something in his strap and everyone on instinct, raise their weapons on him.

"Relax. I'm retrieving something from my utility bag that will help you believe me." Cable explains and pulls out a damaged USB stick. "It's a fanny pack, and you know it." Cisco jokes since he believed Cable already and he hands the stick to Peter.

"That's the entire multiverse mapped out. Every world from who can be found, numbered and the timetable before they're destroyed." Cable informs him and Peter plugs it into a holographic projection and they see all of the multiverse are to be destroyed. And their universe is the last to go out.

"Please tell me we have a plan to stop it." Scott begs them seeing their universe is on the map. "Like I said, your friends are rendezvousing on Earth-38 to stop the end, you stop it there, you can change the future." Cable tells them and Cisco opens a breach for Peter.

"Okay, here's the plan. Me, Daisy and Yo-Yo are going to Earth-38 to stop it from being destroyed. Everyone, you get prepared for the end of days." Peter says when a flask of light comes in and they see Lyla Diggle.

"Lyla?" Peter asks seeing her. "I'm Harbinger now." Lyla corrects him and they're completely annoying by everyone constantly appearing. "I'm working with the Monitor now. He sent me to bring your team to Earth-38 to stop the crisis." Lyla explains and they see that saves time.

"We're ready for it." Peter tells her and grabs the Iron-Spider case while everyone isn't entirely sure about that. Lyla takes Daisy, Natasha, Yo-Yo, and Peter to Earth-38 to stop the crisis.

"Okay, someone get in touch with Wanda and Vision, were gonna need their help." MJ tells them and they know they're gonna need all the help they can get. "Cable, how much can you tell us about the Crisis?" MJ asks the new man as Cisco goes back to his universe to prepare the team.

"Everything." Cable informs her and they know this could help them with their plan put into motion.

-

On Earth-38, Lyla appears in the center of the chaos and gets dozens of guns pointed at her. "Did you do this?" Kara asks Lyla, stepping around the agents. "Did you destroy Argo?" She questions when another flash comes in and the other heroes arrive.

Kara notices Clark and Lois and are happy to see they're okay. "Where are we and what just happened?" A new member asks Peter has not met before, Kate Kane, the Batwoman.

"You're on Earth-38." Lyla informs her before she punches Lyla. "That rabbit was about to talk!" Kate informs Lyla.

"This one speaks to rabbits." Brainy clarifies.

"It's okay. We're all on the same side." Kara tells Kate. "Really? Because I don't know them." Kate states seeing the Avengers group. "Hey, the feelings mutual, rabbit whisperer." Daisy tells her since that is basically what she just said.

"But you know me. And if you were brought here with all these other heroes, it's probably because we need you. I trust everyone in this room with my life." Kara explains to her and they see this is the team. Supergirl, Superman, Oliver, and some blonde girl who looks similar to Oliver, Batwoman, and Peter's team of small Avengers.

Batwoman then decides to remove her mask and looks towards the team. "Well, I guess you should all call me Kate." She tells them.

"I'm Mia. I'm Oliver's daughter." The blonde girl greets them all. "I didn't know you had a daughter, Oliver." Peter states. "Yeah, he gets that a lot." Mia tells him.

"Well, I'm Peter, Spider-Man. This is the Black Widow, or Natasha Romanoff. Daisy Johnson, Quake. And Yo-Yo Rodriguez." Peter introduces the group.

"Okay, now start talking." Alex tells them all trying to understand everything.

-

They're all brought into a meeting room to talk privately. "There's a wave of antimatter sweeping across this universe, destroying everything in its path." Lyla shows them as the wave has already destroyed most of the solar system.

"So that's what Harry was talking about antimatter destroying his world." Peter states and Oliver explains he saw it happen personally.

"I brought you all here to Earth-38 because this is where the Monitor wants you to make your stand." Lyla tells the heroes. "This universe is a tipping point. If we don't stop the antimatter wave here, it will consume the next universe. Until all life has been obliterated everywhere, not only every earth, but everything." Lyla explains to them.

"This is what Cable was warning us about?" Daisy asks and they get looks from everyone. "Who's Cable?" Kara asks them.

"He is someone who just recently showed up and claimed to be from the future where we failed, and was sent back to stop the end of the multiverse." Yo-Yo explains and that makes some of them nervous. "And we know he's telling the truth, since Peter was the one who sent him back." Natasha informs them.

"So we failed how many times?" Oliver asks Peter. "From what he told us...253 different times." Daisy answers his question.

"Where's Barry? Where are the Legends?" Peter asks Lyla since they're not here. "They're doing reconnaissance." Lyla explains and heads to check on them.

"I still don't like her." Kate informs them.

"Well, Brainy's algorithm tells us exactly how much time we have until the antimatter wave hits." Alex offers, but Peter remembers what Cable told them. "No need. Cable told us that this universe has 5 hours left before the antimatter wave strikes." Peter informs them all.

"Well, that saves us some time. Thank you all for being here, I know we can beat this together." Kara tells them and now they know they have 5 hours before their world dies.

The room starts shaking and they realize it's the whole world and run out to see a giant building coming out of the ground. "That's not normal, is it?" Natasha asks them.

Suddenly, Lyla returns with Sara Lance, Ray Palmer, and Barry. "It's okay. The tower is ours." Barry tells them all.

"It's a quantum tower, apparently." Ray explains to them. "Scott's right, we do put quantum in front of everything." Daisy tells them and they agree.

"And it's the only thing that can save the people of this world." Lyla tells them.

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