Squadron Leader Quint Munroe, a World War II RAF pilot, struggles to cope with the presumed death of his friend and brother-like figure, Sq. Leader David 'Scotty' Scott. When a crucial mission arises to sabotage a Nazi flying bomb installation in occupied France, Quint is tasked with selecting and training a team to aim a bouncing bomb into an underground launching tunnel. As he works to complete the mission, Quint falls in love with Scotty's widow Beth and navigates a complex web of loyalty and duty.