Bill McKenzie is a retired lawyer who prefers to spend time working on his ranch. But he occasionally takes on a case wherein the defendant is wrongfully convicted or falsely accused, and he’s a friend of Perry Mason. Mason asks him to fill in for him at some thing wherein he is suppose to give a speech. At the thing are some important people including a chess master whom McKenzie knows. Also, there is a sleazy interviewer who is forcing the chess player to be on his show when he refused, and when the interviewer is found dead, the chess player is arrested, and McKenzie defends him. Della Street and Ken Malansky offer their assistance, and McKenzie tries to find out who had motive to kill the man.