Survival Knife (2016)

SURVIVAL KNIFE picks up where the typical Hollywood slasher film ends. Penny (Danielle Donahue) is the sole survivor of a vicious attack that killed five of her closest friends. To escape she was forced to brutally kill her would-be murderer. As she begins the slow process of recovering both physically and mentally, she struggles to deal with both the violence that happened to her, and the violence she committed herself.