A Secret Service agent poses as a waterfront hit man to infiltrate a global ring of counterfeiters.

Freelance photographer Cliff Wilder (Robert Stack) finds himself the target of various colorful villains in this quest for an ancient Chinese treasure when he accidentally acquires the key to its location, the Peking medallion.

The cases of master criminal defense attorney Perry Mason and his staff who handled the most difficult of cases in the aid of the innocent.