1943. Anna Petrova is a combat pilot who was seriously injured. She returned to the rear and works as a chief engineer at an aircraft factory, where new Krecheta aircraft are being prepared for testing. The management of the plant, not knowing about the consequences of her injury, instructs Anna, together with Major Zotov, to overtake the prototype of the Krechet to the front. In addition to the desire to defeat the enemy and return home with a victory, Anna also pursues a personal goal. She is determined to get even with Major Briggel, the German pilot who killed her lover.