From The Perry Mason TV Show Book
Peter Breck returns to play Pete Warren, a man whose soon to be ex-wife, Myrna, is killing time in a Reno casino, waiting for their divorce to go through.

But when Myrna gets involved in a counterfeit gambling chip scam, Pete makes the mistake of lying to protect her. Then, when someone cashes in Myrna’s chips permanently, the suspicion falls on Pete, who, the authorities claim, manufactured the phony chips at his novelty company. It’s left to Perry to figure out just who’s not playing with a full deck.