When Lisa's father is killed in a hit and run, we discover that he has a secret daughter from his first marriage. Her name is Marie and she is a convicted murderer, out on early release from prison, and driven by a single purpose-revenge. Living under a secret identity as Bethany, Marie has connived her way to living and working close to Lisa, lurking and planning her revenge as payment for the life she feels cheated out of-a life she feels their father unfairly gave to Lisa. Marie has set a deadly trap for Lisa to take back what she is owed, leaving Lisa, her mother and their friends to fight for their lives against the murderous sister she never knew. 　　译文(2): 丽莎的父亲死于肇事逃逸，我们发现他有一个秘密的女儿，从他的第一次婚姻。她的名字叫玛丽，她是一个被定罪的杀人犯，提前出狱，目的只有一个-复仇。玛丽以贝瑟妮的秘密身份生活着，她默许自己与丽莎生活和工作在一起，潜伏着并计划着复仇，以此来偿还她感觉被欺骗的生活——她感觉他们的父亲不公平地给了丽莎这样的生活。玛丽为丽莎设下了一个致命的陷阱，让她拿回自己应得的东西，留下丽莎、她的母亲和她们的朋友们与这个她从不认识的杀人姐姐为生存而战。