Two vaudeville performers, Scat Sweeney and Hot Lips Barton, wander the United States after accidentally causing a fire at one of their performances. To avoid getting caught, they stow away on an ocean liner bound for Rio de Janeiro. On board, they meet Lucia, a down-on-her-luck performer who's under the influence of her manipulative aunt, Catherine Vail. Scat, immediately smitten with Lucia, decides to help her escape from Catherine's clutches. Along the way, they encounter numerous comedic misadventures and form a band to earn their keep on the ship while trying to evade detection as stowaways.

Upon arrival in Rio, the trio finds themselves tangled in a series of miscommunications and schemes involving Lucia's unforeseen engagement and Catherine's mysterious plans. They navigate the vibrant city of Rio de Janeiro, facing obstacles that test their wit and camaraderie. Scat and Hot Lips must use their entertainer's charm and resourcefulness to ensure Lucia's happiness and their own safety, leading to a thrilling chase through the city's lively streets. With their enduring friendship and comedic resilience, they strive to overcome the odds stacked against them.