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...

Platinum blonde Veronica Dale, is arrested on a charge of vagrancy. Yet, she has a hotel reservation in her name. Addison, head of a department store, booked the room for her and is now being blackmailed. Perry Mason can't decide who is hiding what. Then comes murder--and one of Perry Mason's toughest trials.

"Defense lawyer Perry Mason needs a temporary typist, but the one he hires turns out to be more temporary than expected. When she disappears, leaving a couple of diamonds behind in her haste, Mason winds up taking on a new client: a gem importer in his office building who's been charged with smuggling and murder. But if Mason's going to untangle this case, finding the typist is key"--Back cover.

The bait is half of a $10,000 bill, delivered to Perry Mason by a man who promises the second half of the note should his companion, a silent masked woman, ever require the lawyer's services. When a dead body is discovered soon after, Mason feels the hook--but how can one prove the innocence of a person whose identity is unknown?

Perry Mason must solve the murder of John Milicant, who under several names has engaged in activities like blackmail and the manufacture of fixed dice.

When Perry Mason and Paul Drake ran the ad, all they were hoping for was a clue to the identity of a hit-and-run driver. The first reply looked suspicious. It said that the license number of the wanted car was written down in the notebook of a woman who could be out of her apartment from two to five on a certain afternoon, and a key to the apartment was enclosed."Could this letter," Mason asked Della Street, "have been written by the woman herself?...