AN: Hi guys! My name is Natalie. I am a huge fan of TMI and TID (as well as any other Shadowhunter books that come out!) and keep wondering what would happen if the characters of TMI met their ancestors. There are a lot of fanfics like these, but few are well written (though mine might be horrible as well) and even fewer are completed. Hopefully, I'll remedy these issues (…hopefully…) If you have any suggestions, comments, concerns, plot holes, etc. please point them out to me! I cannot say I can update regularly as junior year (11th grade for all you non-USA folks) is upon me! Thank you lovelies!

This is set after CoHF (before the epilogue, but including some things that are in the epilogue, I'm not sure; call it artistic liberties) and during CP2

London, 1878

The London Shadowhunters were gathered in a circle in the drawing room, with all eyes on Gabriel Lightwood. He was covered in blood and ranting about how he needed to speak with his brother immediately. Tessa, in her golden wedding dress, couldn't imagine how Gabriel had managed to bleed that much, if all of it was his of course. Jem, standing next to her, interlaced his pinky with hers. It had become commonplace for them; Tessa often found herself extending her fingers in order to wrap them around Jem's. Ever since their first kiss, Tessa couldn't help but feel the spark that shook through her when they touched. She gravitated towards it like a moth to flame. Will, on the other hand, emitted waves of despair and hatred and seldom looked her way.

As Gideon attempted to calm his frantic brother, who was screaming about Benedict Lightwood being a worm, Tessa could swear she heard noises emanating from the ceiling above her. An odd swirling sound seemed to come from the bricks. She could hear Will's demon pox jokes and Jem's calm reasoning in the periphery but the focus of her senses was on a spot in the stone that seemed to swirl and grow larger with each passing second. As the sound grew louder, the urgent voices of the Lightwood brothers quieted and all residents of the Institute looked towards the source of the sound.

New York, 2008

Clary, Jace, Alec, and Isabelle sat in the Institute's library. Even after surviving two major wars, travelling to hell and back, and defeating the greatest evil this side of the 19th century, all before they turned 20, the New York Shadowhunters were bored. There had been little demon attacks since Jonathan's death. Things were rather quiet. Maryse and the other 'adults', including Jocelyn and Luke, were in Alicante for a Council meeting. Alec had volunteered to stay behind to oversee the Institute.

Currently, Alec, in one of his oversized sweaters, was biting his nails and pacing. His parabatai, on the other hand, was eerily still: twisting his fingers through Clary's, who sat on his lap. Isabelle was half-asleep in one of the armchairs.

"We need to do something," Alec said, "I can't just stay here pacing all day. I'll go mad."

"I assume we could read some of the forbidden books, on the top shelves. The ones Hodge never let us read," Jace suggested.

Alec shrugged and walked to the ladder that allowed him to reach the top shelves. "Hey Jace, there's one up here about demon pox."

Jace's eyes lit up. "Demon pox, oh demon pox," he began singing a tune reminiscent of a children's song, "just how is it aquire-"

"Jace, do you have to act like an idiot all of the time or do you reserve that just for our company?" Isabelle deadpanned.

"I feel that acting in any other way around others would just be hypocritical and rude Izzy. I don't like to discriminate." Jace flashed his earth-shattering grin and Clary wondered what she had done in a previous life to deserve the atomic-bomb of boyfriends.

"Do you want the demon pox book or not? If not, I'm coming down; it smells like mold up here." Alec called from the ladder.

"Go ahead Alec, I feel that everyone would benefit from a lesson on demon pox," Jace drawled looking straight at Isabelle. Alec dropped the book from the ladder, expecting Jace to catch it. Jace didn't notice the book falling until it hit the ground, opening to a random page inscribed with runes.

The runes' very being whispering words of travel, dimensions, lifetimes, and worlds. Alec came down the ladder just as the runes began glowing, a hollow sucking sound coming from the book. In an instant, the book had become a swirling black hole, drawing everything into it. A wind whipped around the Shadowhunters. Jace gripped Clary's hand as they were drawn into the Portal.

London, 1878

As the London Shadowhunters gazed at the swirling vortex, new sounds emerged. Sounds of people.

"Ow, Jace"

"Izzy, that's my foot!"

"Clary, don't let go"

"I swear on the Angel Jace, if you land on me…"

And then 4 human bodies fell through the hole in the ceiling. Only the golden-haired boy managed to land on his feet, his hand tightly holding the redhead's.

Both groups of Shadowhunters stood silent, staring at each other. Tessa noticed that the girls were in rather…inappropriate clothing. The redheaded girl had on tight pants with a stele tucked into the waistband, splattered with paint, and a blouse that only covered her torso and top of her shoulders. The black-haired girl wore a loose silver dress that was short enough that her heavily Marked legs were visible. Finally, Charlotte broke the silence.

"Who are you?"

AN: I know this chapter is short and cheesy. It's hard to explain time-traveling in a world that doesn't really set any laws for it. I do have an outline set up for this, so I do have an idea for how I want this to go. Hopefully it will follow to CP2 plotline, with a few minor changes to include the TMI group. I was planning on the TID Shadowhunters knowing that the TMI group are Lightwoods, Herondales, and Fairchilds, but not knowing who is whose descendant. (For example, Gabriel and Gideon don't know who Alec and Izzy are descendants of and Charlotte and Henry don't know if Clary is theirs or maybe one of Charlotte's cousins.) I'm also planning on name dropping Emma Carstairs, so that Jem and Will don't know who Tessa marries (I'm assuming that there are more Herondale males outside of Will).

Thank you for reading this, the second chapter should be up soon!

You can find me on Archive of Our Own at the same username (StuckInMyDreams).

Feel free to message me!