Hornets' Nest is the story of Captain Turner (Rock Hudson), the American paratrooper who employs Italian children to blow up a strategic dam controlled by the Nazis. He is the only survivor of his unit gunned down during the jump. Rescued by the children, Turner convinces German medico Bianca to help in the clandestine mission. Aldo is the youthful leader who helps Turner carry out the bombing in exchange for an attack on his village. When the Nazis control the small town, their allegiance quickly changes as they fight the Germans they once considered allies.