Pola investigates on her own after her friend Tina has disappeared without a trace after a blind date on the Berlin Museum Island. Tina's profile on a dating portal finally leads Pola to her lover Sven. At the same time, Tina's husband Karl receives a sex video featuring Tina and Sven. A short time later, Sven is dead, and the bound Tina is released from his apartment. Everything points to Karl as the culprit.