Ernest Stone has enlisted the help of John Brooks in a scam he has planned against two aging relatives, Sophia and Nineveh Stone. Brooks is to show up at the Stone's home and tell them he is a good friend and one-time shipmate of their nephew, Caleb Stone IV who was born out of wedlock and given to an orphanage when he was very young. The idea is that Brooks will demonstrate detailed knowledge of the house, the family and so on, so as to suggest he is the real Caleb Stone IV but always deny that he is. The elderly aunts are soon convinced that he is their long-lost relative and approach Perry Mason to change their will in Brooks' favor. Perry, realizing that John Brooks may be a scam, tries to delay them as he investigates Brooks. Brooks grows to like the old ladies and tells Ernest Stone that he wants out of the scam. When Ernest is found dead, John Brooks is charged with murder and Perry defends him.
—garykmcd / edited by Rob