一艘在海上航行的船只，被一种变异的双头鲨鱼袭击。幸存者游到了一座荒岛上寻求庇护，但是噩梦远没有结束。

A group of young adults spend the weekend at a friend's house by the lake. Joined by the local sheriff, the group encounters an escaped convict Native American chief, a copycat killer and the return of the terrifying masked stalker, Damon.

　　Sometime in the near future, paraplegic prison inmate Matt Mills meets "The Board" of Satoshi-Telefair Industries, who thank him for joining the Program. Under pressure and with a promise to make him walk again, Mills agrees to volunteer. He is injected with a synthetic nanomaterial and suffocated, only to wake up with restored use of his legs, yet alone in a steel cell in the first spoke of an experimental apparatus - The Wheel. A series of assailants inflict a multitude of damage to Mills' body and torment his mind, yet the synthetic nanomaterial not only restores his damaged organs, it re-engineers his strength. The experiment might be designed to kill, but Mills is determined to survive - and get back to his daughter before The Board finds her first.

影片的男主角基顿（巴斯特·基顿 Buster Keaton 饰）是一名乡村影院电影放映师，他喜欢阅读侦探类的书籍，经常幻想自己就是一名像福尔摩斯一样的大侦探。一天，他把价值一元的巧克力糖谎称四元送给女友凯莎琳（Kathryn McGuire 饰），不料被情敌趁机陷害，说基 顿偷了别人的手表拿去当才有钱买巧克力。凯莎琳相信了谗言，遂将基顿赶出门外，并取消了二人之间的婚约。基顿查访之后，发现情敌才是偷表典当的家伙，但却苦无证据洗清冤情。某日，基顿在放映电影时，发现银幕上的故事竟和他的遭遇同出一辙，而且人物也雷同，唯一不同的是电影中的故事发生在一个上流家庭而已。基顿边放映电影边沉溺在电影之中，于是走出放映室，从观众席走入银幕之中逮捕情敌罪犯。可是进入银幕后的基顿却四处碰壁，一筹莫展．随着场景的变化，银幕上的映象不断从幻想变成事实……

在野外徒步旅行时，五位好友遭到神秘枪手的都追杀，陷入一场绝命逃亡之战