After discovering a mysterious card game, a family is thrust back in time to a medieval village where they must fend off dangerous werewolves each night.

The story focuses on a special unit of Czech intelligence, known as the Extraktoři (Extractors). The unit operates in secret and its main mission is to ensure the safe return of endangered Czechs from abroad. The story offers insight into the world of espionage and international covert operations and is inspired by true events.