 Disabled "John Brant" marries Clara Hammon, but the bridegroom is really Clara s lover, actor Earl Malden. Through a series of crafty moves, the real John Brant has gained control of everything Jo Ann Blanchard and her ne er-do-well brother Terri have inherited. Clara is also having an affair with Terri. Now Brant wants the Blanchards  thoroughbred stallion, Spindrift, to race under his colors. Brant s ward, Peter White, is in love with Jo Ann and takes issue with the old man. Jo Ann consults Perry Mason, who finds that the horse is not covered by Brant s claims. Clara and Terri plan to murder Brant and blame Spindrift. Brant is found dead in the horse s stall, and Jo Ann is arrested.