在一个超市里，离异女苏珊正带着两个孩子购物，当两个孩子正在为零食发生争执时，大卫出现了，他以机智幽默的话语调解了孩子们的纷争，引起了苏珊的注意。而他故意打造的完美形象让苏珊对他顿生好感。在大卫的刻意安排下，两人的关系突飞猛进，大卫住进了苏珊家里，婚姻也被提上了日程。在订婚宴上，大卫见到了苏珊的大儿子迈克，他用心思让迈克对自己的好感度直线上升。但随着时间的流逝，大卫那不为人知的一面逐渐浮出水面。因小儿子玩游戏声音过大，大卫就直接掐孩子的脖子威胁他，邻居老太太发现大卫与网上通缉犯相似，便死于非命；苏珊女友因帮助给大卫介绍工作发现其身份可疑，也被大卫掐死……迈克和女友在对大卫偷偷调查的过程中，被大卫发现，大卫毫不犹豫地进行他的再一轮屠杀…

In a supermarket, the divorced woman Susan is shopping with her two children. When the two children are arguing over snacks, David appears Yes, he mediated the children's dispute with witty and humorous words, which caught Susan's attention. And the perfect image he deliberately created made Susan have a good impression of him. Under David's deliberate arrangement, the relationship between the two developed by leaps and bounds. David moved into Susan's house, and marriage was put on the agenda. At the engagement banquet, David met Susan's eldest son Mike, and he tried his best to make Mike's affection for him soar. But as time passed, David's unknown side gradually surfaced. Because the younger son was playing games too loudly, David directly threatened him by choking the child’s neck. The old lady in the neighborhood found that David was similar to a wanted criminal on the Internet, so she died. He was also strangled to death by David... During the secret investigation of David, Mike and his girlfriend were discovered by David, and David did not hesitate to carry out another round of massacre..