Marceline,age 18 a girl who's been running all her life surviving the worst finally decides to join an underground military. Xavier,also known as "Gunner" is the lieutenant of the Military base known as "the vipers" is a cold 35 year old man who lost the ability to feel ages ago. Marceline with her amazing abilities that no one knew about till training was perfect for the team. If she didn't have trauma that would trigger her in the middle of her first mission. Xavier was assigned to help her with her trauma,only thing was,if she didn't pass in 3 months,she was out. This story follows enemies to lovers,slow burn,trauma, and triggers that some might not enjoy.