Summary Jakob is courting. Vanessa is the woman of his dreams. His happiness comes to an abrupt end. Vanessa is recovered dead from Lake Constance. Drowned. Paul wants to take his colleague off the case immediately because of bias. But the worldly-wise Nele fears Jakob will go it alone and keeps him on the team. He immediately sets his sights on Vanessa's ex-boyfriend Bastian. He has traveled to Vanessa from Düsseldorf to settle debts from a joint business. Bastian claims to have spent the night with the receptionist Marianne Tillich. A shaky alibi. But what about Yvonne, Vanessa's sister? She lives with her boyfriend Georg in a house on the lake with a boat rental service. She would have had to give up the idyll and sell the house in order to pay Vanessa's share of the inheritance. Yvonne gives the investigators another version. She wanted to sell the house and emigrate to Spain with her sister - without Georg, but also without Jakob. He is having an existential crisis. Nele proves to be a comforter. And her mother Mechthild finds a surprising connection with Jakob, who secretly investigates - until the surprising showdown on the lake.

• Crime