There are plenty of guilty secrets at the school where Hildegarde Withers teaches. When she finds the body of the pretty music teacher, she calls in her old friend Inspector Piper, who promptly arrests the obvious suspect. Clues multiply and everyone looks suspicious as Piper and Miss Withers continue their battle of the sexes.
Edna May Oliver
as Hildegarde Withers
James Gleason
as Inspector Oscar Piper
Bruce Cabot
as Addison
Gertrude Michael
as Jane Davis
Regis Toomey
as Detective Smiley North
Edgar Kennedy
as Detective Donahue
Tully Marshall
as Mr. MacFarland
Jackie Searl
as Leland Stanford Jones
Frederick Vogeding
as Otto Schweitzer, the Janitor (as Fredrik Vogeding)
Barbara Fritchie
as Louise Halloran
Gustav von Seyffertitz
as Dr. Max Von Immen
Tom Herbert
as Detective McTeague
