Schimanski's colleague and friend, Inspector Hollai, who had worked as an undercover agent for three years, has been exposed. Shortly before that, Hollai had heard about a "big heist" that was being planned: a robbery of a cash-in-transit truck. He investigates the case alongside Schimanski. Schimanski notices how difficult it is for his friend to shed his false identity as a criminal. Hollai feels out of place with the daily grind and his office tasks. Is he still in contact with the other side? Could Hollai possibly be involved in the heist as well?