Stiles was 11 years old when he became an Assassin. He started training with his mom at the age of 6 and became one of the best in his class. He quit his life after a job gone wrong when he was 13. The Pack doesn't know about his secret life. Stiles never forgot himself and still secretly trains on his own. He hides his fit build and his many scars though. He never changes in front of people. He is forced to show off a little bit (a lot a bit) of his skill when someone or something from his past is unleashed on Beacon Hills. Stiles is very skilled in hand-to-hand combat and the use of a gun. What happens when this thing from his past ends up getting his friends hurt? Will Stiles be able to explain his past and keep his friends? Only time will tell. P.S: Siles' code name was Thomas so yall know I am gonna do Newtmas. and no Newt is not the thing that hurts Stiles' friends. That is someone else. There may be some language and some mental health issues. The rest of the gladers will be involved Issac and Jackson never left. Allison is alive. Set in-between season 4 and season 5. My own plot and storyline. Think of it as season 4b Liam was bitten by Scott and mason is a werewolf due to the dread doctors. Hayden is not here and Theo is a good guy now.