The story revolves around a Basque Roman Catholic priest dedicated to committing as many sins as possible (Angulo), a death metal salesman from Carabanchel (Segura), and the Italian host of a TV show on the occult (De Razza). These go on a literal “trip” through Christmas-time Madrid to hunt for and prevent the reincarnation of the Antichrist.

A soldier from the 15th century, a university student from the 19th century and a nurse from the present join the secret ‘Department of Time’, a secret department within the Spanish government with the ability to travel through time. Their mission is prevent changes in history.