With the rapid development of modern science and technology, various means of communication are becoming more and more advanced, which not only shortens the distance between people, but also makes people's privacy nowhere to hide, and even their lives are greatly threatened. In a high school, death chain letters are popular recently, which are sent by e-mail to other people's computers and mobile phones, and should be forwarded as soon as they are received, otherwise they will be in danger of life. Computer game fan Neil Kenas (Cody Kasch) accidentally receives a chain letter, which he and his sister Rachel (Caroline Wilson Cherilyn Wilson) jokingly send to Johnny Jones (Matt Cohen Matt Cohen), Jessie Campbell (Nikki Reed Nikki Reed), Dent and other friends, who also regard it as a joke, or delete or forward it, completely ignoring it. However, terror came, and that night, Johnny was brutally killed. The chains of evil and perverts are getting closer and closer.