In a joint effort with cultist Brunner, Ellie and Gedeon try to set a trap for the killer. For this plan to work, they have to overstep legal boundaries. Trying to gain the trust of the killer, they feign a copycat murder, hoping their target would be lured into reaching out to Brunner. Meanwhile, Ellie has started an affair with her superior, whereas Gedeon has been haunted by his shady past as a corrupt narcotics cop.

A fierce detonation blows up a fashion outlet mall in Passau. Despite Ellie and Gedeon trying to evacuate the building in time, a child is fatally wounded in the explosion. The deadly assault riles up the general public, whereas politicians and the media demand fast results from the police. In Austria, Gedeon has to fight to stay on the case. In Germany, Ellie loses trust in her superiors more and more. After the Krampus Killer has leaked details of her affair with her boss to the press, her life collapses.