In post-World War II Berlin, a congressional committee arrives to assess the morale of American troops stationed in the devastated city. Among the group is prim and proper Congresswoman Phoebe Frost. As she navigates through the war-torn streets, Phoebe becomes increasingly concerned about the indulgent conduct of the soldiers. During her investigation, she stumbles upon ex-cabaret singer Erika von Schluetow, who has connections with key military personnel and may be involved in unpatriotic activities. Phoebe's determination to uphold American values puts her in direct conflict with Captain John Pringle, who is romantically entangled with Erika.

Captain Pringle, tasked with keeping the Congresswoman at bay, finds himself caught between maintaining his facade and protecting Erika. Phoebe's initial sternness begins to waver as she is charmed by John’s charisma and her own feelings begin to complicate her mission. The already tense situation is further strained by revelations and divided loyalties, leading to a poignant exploration of love, duty, and moral ambiguity amidst the ruins of a broken city. The narrative weaves humor and drama as these characters navigate their complicated relationships and the harsh realities of their environment.