Question: is the movie unbreakable based on a true story

Answer: No, Shyamalan organized the narrative of Unbreakable to parallel a comic book's traditional three-part story structure. After settling on the origin story, Shyamalan wrote the screenplay as a speculative screenplay with Bruce Willis already set to star in the film and Jackson in mind to portray Elijah Price. Filming began in April 2000 and was completed in July.