A wealthy couple, Michael and Elvira Kent, suspect each other of infidelity due to their constant separations and busy schedules. Michael cancels their planned anniversary cruise, claiming business obligations, but actually intends to stay back to spy on Elvira. Conversely, Elvira enlists a young nightclub singer named Georgia Garrett to take her place on the cruise under her name while she stays behind to catch Michael in the act. Georgia, thrilled at the opportunity for adventure and relaxation, agrees to the plan without considering the potential complications.

As Georgia embarks on the luxury cruise posing as Elvira, private detective Peter Virgil is hired by Michael to shadow "Elvira" and report back on any suspicious activities. Peter tailing Georgia leads to a series of comedic misunderstandings and romantic entanglements. Their interactions grow more complex as Peter finds himself increasingly charmed by "Mrs. Kent," all while remaining unaware of her true identity. Intrigue and chaotic romances unfold on the high seas, raising stakes and misunderstandings, but the true resolution of each character's dilemma only begins to surface halfway through the voyage, leading into a whirlwind journey of hidden truths and unexpected turns.