In Nazi-occupied Warsaw, a small Polish theater troupe led by Joseph and Maria Tura navigates the perils of war while continuing to stage their comedies. Joseph, a vain actor, becomes suspicious when his wife Maria starts receiving flowers from a dashing young aviator, Lieutenant Stanislav Sobinski. As Maria becomes more distant, the troupe's performances are abruptly halted by the invasion. Lieutenant Sobinski is assigned a mission to England, where he learns that a German spy, Professor Siletsky, is headed back to Warsaw with crucial information that could expose the Polish resistance.

Determined to thwart Siletsky’s plans, Sobinski returns to Warsaw and enlists the help of the Turas and their theatrical troupe. Using their acting skills and elaborate disguises, they devise a daring plan to deceive the Nazis and prevent Siletsky from handing over the list of resistance members. The stakes grow higher as they maneuver through increasingly dangerous situations, risking their lives in a blend of humor and suspense to protect their fellow countrymen.