As police investigate the bizarre and brutal murder of alluring singer Katharina Läufer, five of her former classmates reunite at her funeral.

The detectives make a gruesome discovery. At the brothel, Butsche bonds with Pearl's daughter, Elsie. Nadja learns about the group's shared obsession.

Butsche visits Elena for help with Elsie, angering Roman once again. Nadja drops a bomb on Grünberg and tests a provocative hypothesis about Katharina.