Almost half of the human race was swept clean when an organization called WICKED released a deadly virus they called the Flare. But of course, they didn't let the world know that. They made people think that they were the good ones and they were helping create a cure, when in fact they planned it all along to release the said virus to control the population of humans. During the process two groups, of young boys and girls, were used as test subjects. They were brought in a secluded environment with no memory of who they were and were only left with their first name. They would then work together in rebuilding a community of their own which tested their physical and mental capabilities. They had no clue that everything were set up by WICKED for them to check their brain activities and see what made a certain individual immune to the virus. But these test subjects weren't ordinary, they were exceptionally smart and realized from the beginning that WICKED couldn't be trusted.

With the help of the Right Arm, a group of people against WICKED, the groups of young boys and girls defeated the said organization. A lot of friends and loved ones were lost at the process but, their sacrifice didn't go to waste. The remaining people that were immune lived together and one of them even successfully found a cure in which they used on saving the lives of the cranks.

Because of that tragedy, Thomas and Minho built a new headquarters where WICKED used to stand and called it TAIMN, which was read as time. It served as a memorial for their friends that they lost and Thomas swore that he would use the power of science to correct things and not use it for evil. With the help of Hans, they created the TAIMN pods, the most important equipment in TAIMN for them to travel back in time and stop whatever catastrophe any government leaders were planning to do. With the success of the headquarters, they were able to stop destructive events from happening and somehow created a better world. Rebuilt the world even.

The organization TAIMN have three important types of workers— the TAIMN traveler, Watchers, and Clock Master. The TAIMN travelers are the ones that go back in time to stop any catastrophe from happening and are very skilled in combat. The Watchers are the ones that keep an eye on the TAIMN travelers when they are on a mission. They are the ones in charge of preparing the TAIMN pods, which serve as some sort of time machine. When a traveler is given a mission, he or she has to lie down in a pod and have wires attached to their bodies to scan their body's and brain's condition. Once everything is set, the pod is closed and an odorless gas fills the pod making the traveler unconscious. The Watcher will then check on the computer screen for a green light which is the signal that the traveler safely reached their destination. The last important worker is the Clock Master. Their task is pretty simple, when a traveler gets badly injured during a mission it is the Clock Master's decision to bring them back to the present time. They either give them enough time to recuperate or bring a new traveler to continue the mission.

One of TAIMN's important rules is that you cannot go back in time for any personal matter that you would like to change. But Thomas, the head and founder of the new organization, decides to break his own rule for one special mission. The reason he came up with TAIMN in the first place is to commemorate his friends that passed away due to WICKED's work. For him, they deserved to be alive just like him. And so, he called up one of their greatest TAIMN traveler and told her to go back in time and experience the experiments they've been through and get all his friends out alive as much as possible.