Unbreakable is a 2000 dramatic thriller film written and direct by M. Night Shyamalan, and is the follow-up to his previous film The Sixth Sense (1999). In a 2008 interview with Sci Fi Wire, Shyamalan expressed interesting in writing a sequel for the project.Sci Fi Wire: Shyamalan Mulls Sequel (October 7, 2008)

David Dunn (Bruce Willis) is a humble security guard trying to repair his marriage and family life, when he is involved in a devastating train crash which kills 131 people. He is the only survivor. Shortly thereafter Dunn is approached by Elijah Price (Samuel L. Jackson), a wheel chair-ridden comic book fanatic with Osteogenesis Imperfecta, a disease that gives him extremely brittle bones. Price claims that Dunn is in fact a comic book superhero. He goes on to explain how he has instigated numerous catastrophic accidents in order to flush out his superhero nemesis, an unbreakable man. Though Dunn at first thinks Price is insane, through the faith of his son Joseph (Spencer Treat Clark) and his own personal awakening, he comes to accept his fate as a superhero. Dunn learns to perfect his superhero abilities: sensing future evil events when people touch him, and invincibility to physical attacks. However, like every superhero, Dunn has one weakness, one which he has carried with him ever since childhood: water.