Follows Morgan, a single mother of three with a brilliant mind, as she rearranges some evidence during her shift as a cleaner for the police department, aiding in the resolution of an unsolvable case.
本片讲述偶然地目击到杀手事件现场并逃离现场的过程，但却因事故失去记忆，忘记自己是谁，当看到自己手上的日记有著杀人过程的详细资料，以为自己是变态连续杀人犯的故事。
