Ulf, Eva and Renate, all in their seventies, are partying exuberantly during a camping trip in Poland. The next day, Ulf, confused and taken away, is found by hunters at the edge of the forest. He thinks he's killed someone, but can't remember anything. Helpless and desperate, he is taken to hospital and police commissioner Lucjan Gadocha is notified. During a border check, Holm Brendel and Dorit Martens stop Eva's camper, which catches fire and explodes. Holm and Dorit suspect that the three of them are smuggling gasoline to supplement their tight budget. (thetvdb.com)