The gentleman detective of Michael Arlen's short story is hired to guard a priceless gem - but it is not long before his assignment takes a tricky turn, leaving a man dead and the sleuth facing a brain-teasing puzzle. Fast-paced thriller, starring George Sanders, Wendy Barrie, Allen Jenkins and Anne Hunter.

Having forsaken the detective business for the safer confines of personal insurance, Gay Laurence is compelled to return to his sleuthing ways. Along with sidekick Jonathan "Goldie" Locke, he agrees to look into a series of home party robberies that have victimized socialite Maxine Wood. The duo gets more than they bargained for when a murder is committed at Wood's home, but Lawrence still finds time to romance the damsel.