Soviet agent Fedotov is air-dropped into Nazi occupied land. He changes over into Mr. Ekhert, a German entrepreneur wishing to take advantage of eastern worker slave labor in occupied Ukraine. Ekhert (Fedotov) enters into a partnership with a German entrepreneur who's son, Willie, is a high ranking Nazi. Together they go to Vinnitsa, Ukraine and start a factory. Fedotov begins seeking contacts with headquarters, but faces problems when a Ukrainian Nazi collaborator manages to infiltrate the Soviet partisans.
Sailor Garkush and minder Nomokonov after the death of the whole team remain on the armored boat N042 together. Fulfilling the order of the command, they blow up the bridge, but find themselves behind enemy lines. In different ways, an infantryman Soloukhin, director of the bank Kozubenko, circus artist Elton and felon Donchak, who escaped from prison, get on an armored boat. Different in character and inclinations, they did not come together right away. Over time, they were united by a common hatred of the enemy, and in the battles with the Nazis their courage, resourcefulness, selflessness were forged ...
The accountant of the commodity base discovers a small mistake in the documents, as told by the manager of the base. That night, someone hacked and robbed a safe with accounting documents, and committed the killing of an accountant. The case for the search for criminals was entrusted to police commissioner Krechetov and lieutenant Kasyanov.
