After a thieving woman is accused of murder, it’s up to Perry Mason to prove her innocent Sleuthing attorney Perry Mason can’t resist a good mystery, so when he sees an older woman being accused of shoplifting during a department store outing with his assistant, Della Street, he doesn’t hesitate to intervene. Armed with an assumption of innocence and the legal acumen to silence her accuser, Mason leaps to the woman’s defense―until her niece appears, acknowledging her aunt’s guilt, and pays for the stolen items. Soon thereafter, Aunt Sarah is accused of stealing a valuable set of diamonds, and her niece, Virginia, enlists Mason’s aid. The man who left the jewels in Sarah’s care insists that she didn’t take them, but when he turns up dead, she’s left with nobody to vouch for her. Nobody, that is, but Perry Mason―expert in the art of defending the innocent.