Serenity is a 2005 space western film written and directed by Joss Whedon. It is considered a continuation of the cancelled Fox science fiction television series Firefly, taking place after the events of the final episode. Set 510 years in the future, Serenity is the story of the captain and crew of a transport and cargo ship. The captain and first mate are veterans of the Unification War, having fought on the losing side. Their lives of petty crime are interrupted by a psychic passenger who harbors a dangerous secret.