Crime novelist Roger Blackwood competes with hotel house detective Andy McCabe in solving a murder by poisoning at a medical convention.
Starring
Edmund Lowe
Roger Blackwood
Victor McLaglen
Andrew W. 'Andy' McCabe
Rosemary Ames
Eleanor Blake
Mary Carlisle
Olive Temple
Henry O'Neill
Mr. Claude Harvey
C. Henry Gordon
Dr. John Mason Temple
William Janney
Harry Prentice
Charles C. Wilson
Anthony Wilson
John Wray
Feets Moore
John Qualen
Ole
Herman Bing
Hans
Madge Bellamy
Tessie
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