In 1972, the patients and doctors at Stephens Sanitarium were brutally murdered. Over forty years later, the only known survivor returns only to find the ghosts of the past have not been resting in peace.

When he thinks his hamster Abu (Johnny Vegas) has just a week to live, Harry Hill (Harry Hill) and his Nan (Dame Julie Walters) take the hamster to Blackpool. However, Harry's twin Otto (Matt Lucas) wants to kidnap Abu, and sends ...