On a short flight to Santa Catalina Island, California off the California coast, a passenger named Roswell T. Forrest (Brooks Benedict) gets sick. Hildegarde Withers (Edna May Oliver) and the others aboard are startled when he is found dead upon landing. It appears to be murder to Miss Withers, but she has a tough time convincing local Police Chief Britt (Spencer Charters) and coroner Dr. O'Rourke (Arthur Hoyt).