When a museum reports that a precious artefact from its Ancient Egyptian exhibit has taken place, the Spiez are immediately put on the case to retrieve the artefact and catch the bad guy before an evil curse is released upon the city. In the b story: Megan develops a crush on the new boy that starts attending their school... Her brothers are most displeased.

A rogue agent causes problems for the Spiez. However, once Marc is specifically targeted and his life is at risk, the stakes are higher than ever. Especially when it becomes clear that this villain will stop at nothing to get what they want, no matter the cost.