Victor Brady, a leader in the electronics business, runs up a gambling debt of nearly $250,000 to a Las Vegas casino. Brady's private plane disappears from the radar on its way back to Los Angeles, but after his memorial service, his widow hires Joe Mannix to look for him, claiming that her husband is still alive and contacting her for help in raising the money to pay the casino. His investigation leads Mannix to that casino and the assorted people who work for it and who knew Victor Brady.