Vitaliy Kaloev's life has stopped at the moment when the plane with his wife and children collides with the cargo plane. He's searching for justice and persuades air navigation company to apologize and confess it's guilt for disaster.
Lt. Kolya arrives at Brest Fortress, eager to start his service. Before he can enlist, war breaks out at 4am with artillery fire. Though not officially registered, he joins the fortress's 10-month battle.