After her divorce from his wife, Colin Miller (David Chisum) lives a quiet life with his cat in his house stately home of modern successful business, including a high-tech security system. But a stranger has complete control over the security system. The psychopath can be Family father and a bomb in the system is integrated, which will explode if someone tries to leave the house. The family remains now only 90 minutes to answer the question put only psychopath: “Who am I?”. It starts a race against time, each incorrect answer has deadly consequences in this film.