Despite their differences in character, Kofler and Costa understand that they must team up to solve the case, even if the investigation puts a strain on Paolo's love life.

While the relationship between Paolo and Eva becomes increasingly personal, the theft of a painting sees a painter friend of Kofler among the suspects. Eva tries to defend the girl at all costs.

The discovery of the body of the owner of the stolen painting complicates Mathilde's situation. Searching the archives, Eva and Paolo find a lead that could lead them to the Monster.