The film follows four Communist party special agents who return to China after undergoing training in the Soviet Union in the 1930s in the puppet state of Manchukuo. They go on a top-secret mission code-named "Utrennya" together. The crew is besieged by threats on all sides from the time they parachute into the operation after being sold out by a traitor. Will the agents be able to break the deadlock and finish their mission? The team will be put to the test on the snowy grounds of Manchukuo.