This is the third movie from the "Mijn Vader is een Detective" film series.

The five residents of the House of Anubis visit a museum, where Anastacia sees a torque, a Celtic piece of jewelry. When Anastacia doesn't get it off after fitting the torque, she asks her friends for help. When the five are all in contact with the torque they are flashed back in time and they end up in a battle between the ruler Balor and Ward the boy, who is destined to become a king.

Sam and Star had long been friends. Sam's father is a detective and thus learn to know Ortwin. Ortwin's the rare parrot is in fact stolen. Ortwin's father enlists the help of Max, but Max is kidnapped during their quest by a gang of criminals. The kids put a chase with a speedboat and end up on a mysterious island fortress.