Nienke is studying medicine and working at the hospital when Appie is suddenly brought into the emergency room. She discovers that he has been cursed by a Germanic Order. There is only one way to help him and that is to get The Club of the Old Willow back together. It will be a race against time to save Appie, but even more a battle for the old friendship. Can the lure of adventure bring The Club back together? Can the old residents put aside their own differences and disputes?

In this show, the new Anubis residents find half of the hidden Symbol of the Celtic Wheel of Life with its five rings. From that moment on, everything will go differently than planned, and our friends will have to go to extremes.

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.

There is confusion when Appie returns to the House of Anubis with the promise of wealth, as stated in an invitation he received. Fabian and Amber also return to the now dilapidated house, just like Marcel, Pim, Raphael and Sterre (the five of the sword). The seven ex-residents lose all contact with the outside world. Before the day's end, the seven must solve one very last mystery.