Art student Maxine Lindsay, as the guest of her mentor, art dealer Colin Durant, attends a reception aboard the yacht of millionaire Otto Olney , who is unveiling his newest purchase, a $130,000 Gauguin. When Durant confides that the painting is a fake, Maxine becomes involved in a complicated series of deceptions. Soon gallery owner Leslie Rankin threatens Maxine. Perry Mason is called in, a beatnik artist is accused of painting the fake, and Durant is found fully clothed in Maxine's shower, shot dead with her pistol.