Cobb, a skilled thief who commits corporate espionage by infiltrating the subconscious of his targets is offered a chance to regain his old life as payment for a task considered to be impossible: "inception", the implantation of another person's idea into a target's subconscious.

Rose, a desperate mother takes her adopted daughter, Sharon, to the town of Silent Hill in an attempt to cure her of her ailment. After a violent car crash, Sharon disappears and Rose begins a desperate search to get her back. She descends into the center of the twisted reality of a town's terrible secret. Pursued by grotesquely deformed creatures and townspeople stuck in permanent purgatory, Rose begins to uncover the truth behind the apocalyptic disaster that burned the town 30 years earlier.