Time Means Nothing

What if something so bad happened that everyone had to leave Sanctum? What if while one the ship, Clarke found a file that would change everything that they ever knew.

The time travel fic where Raven builds a time machine, because let's be honest here. She is the only one who has the mad genius skills to do it.

Can our favorite people go back and change the past? Can they do better this time and save earth while they are at it? Let's find out.