Achmed’s girlfriend Carlotta contacts Inspector Heldt to ask for help. She had registered her car for carsharing, and now someone has used the app to steal it. At first, Heldt believes the thief is missing girl Melanie Brahms. Melanie’s mother Judith is very disappointed when she learns that Melanie was not in the car after all. The car thief turns out to be young Lucy Kolenda, a minor who was able to start the car using an app on Melanie’s cell phone. But where is 18-year-old Melanie?