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