Lieutenant Goodbody, an inept and overly optimistic officer in the British army, leads his platoon through various absurd misadventures during World War II. Despite his lack of competence, Goodbody is tasked with completing a series of nonsensical missions, typically resulting in chaos and disaster for his men. The platoon, comprising soldiers with clear disdain for their leader, navigates through a series of surreal and darkly comedic encounters, including skirmishes with the enemy and interactions with equally incompetent allies. The film utilizes satirical elements to criticize the absurdity and futility often found in wartime bureaucracy and leadership.

As Goodbody's platoon struggles to survive under his command, each mission reveals the growing disillusionment and frustration among the soldiers, juxtaposed with their leader's unwavering and oblivious cheerfulness. The movie employs a mix of direct-to-camera addresses, absurdist humor, and non-linear storytelling to highlight the contrast between the grim realities of war and the farcical nature of their missions. Amidst the chaos, brief moments of introspection offer deeper commentary on the nature of heroism, leadership, and the dehumanizing effects of conflict. The surreal narrative and comedic elements underscore the anti-war message, maintaining a critical stance towards military conflicts and the individuals who drive them.