Alexey Titarenko is very talented pilot and brave leader of "Singing group". He also must look after some new cadets and fight together with them against German Luftwaffe planes. Close to Alexey always are his friends, they are all from different parts of the country, but they all became real brothers.
Hearing about the revolution in the hospital, the sailor Gulyavin goes to Petrograd, and from there with a detachment of Ukrainian volunteers he is sent to Ukraine. The troop is joined by cavalrymen under the command of the anarchist Lelka. The chief of staff, Stroyev, reproaches Gulyavin with negligence - you cannot take an untested detachment. However, the desperate courage of Lelka in battle with the White Guards gives Gulyavin not only respect for her, but love...
October 20, 1944, Belgrade was liberated by Red Army and Tito's partisans. But the capital of Yugoslavia is still fraught with danger - retreating aggressor mined the city . A special partisan squad goes into underground maze of tunnels to find and disarm explosives which are still guarded by SS special forces.
