Tyler and his brother find an alien ship which makes Tyler appear older and gives him other abilities. This turns his high school life upside down, and may enable him to help his older brother's love life. After he is abducted by beings who intend to takeover Earth, he must depend on his inept and lovelorn brother to rescue him.

狂暴嗜血的连环杀人犯乔纳森•钱伯斯（James Binkley 詹姆斯•宾克利 饰）终于被警长伯格（Robert Englund 罗伯特•恩格兰德 饰）逮捕，他的凶残罪行也总算告一段落。经过审判，钱伯斯理所当然被判处死刑，电椅将是他的最终归宿。
暴风雨之夜，钱伯斯在电椅上结束了他罪恶的一生。法医西钦斯（Michael Cram 麦克•克莱姆 饰）和伯格警长乘坐救护车护送尸体前往医院解剖。半路险情突现，决意自杀的少女莎拉（Meredith Henderson 饰）撞倒救护车，她也被带往医院。
祸不单行，等待解剖的钱伯斯竟然活转，这个恐怖魔王随即在医院中展开无情的大屠杀……