Wonderful idea to give a party with people who dislike each other. Late at night, everyone decides to go into the pool, except Stamm, who is drunk. Montague dives in as does Greeff and Leland, but only Greeff and Leland come out. Montague is no where to be found so Leland suspects foul play and calls the cops. Luckily, Philo is with the D.A. and comes along, but they do not find Montague. When they drain the pool the next day, they find nothing except what looks like dragon prints. Philo has his suspicions and tries to piece the clues together to find out what has happened.
as Philo Vance
as Bernice Stamm
as Gale Leland
as Sgt. Ernest Heath
as Mother Stamm
as District Attorney Markham
as Rudolph Stamm
as Ruby Steele
as Ken Tatum
as Dr. Doremus - Coroner
as Monty Montague
as Dr. Halliday
as Greeff
as Trainor - Stamm's Butler
as Det. Hennessey
as Det. Burke (uncredited)
as Service Station Attendant (uncredited)
as Police Sergeant (uncredited)
as Currey - Vance's Butler (uncredited)
as Commander (uncredited)
as Detective (uncredited)
as Steam Room Attendant (uncredited)
