When a sleazy blackmailer, Luke Dickson, winds up dead, Glenn Robertson (Gene Barry) becomes the murder suspect. It seems that Dickson threatened to expose some ugly information about the past of Robertson's wife, Laura (Jean Simmons), which could be extremely damaging since she was just named to fill a seat in the U.S. Senate. Perry Mason (Raymond Burr), an old flame of Laura's, comes to the rescue and agrees to defend her husband against the charges.