The sign attracts the attention of Martin Jones, who's not only chilly but being chased by the police because his former boss, Professor North, has accused him of stealing $50,000 from the Anthropology Society. Inside the bookstore, he meets a former teacher from his days at Meredith Academy; Leonidas Witherall, "the man who looks like Shakespeare", who has lost all his money and become the bookstore's janitor. The bookstore's new owner is a pretty young redhead of Jones's acquaintance. After the departure of a book thief and a car accident outside, Professor North's body is discovered in the religion section. Witherall and company--which soon includes a wealthy Boston dowager, North's sassy maid Gert, and Gert's mobster boyfriend Freddy--spend the evening tracking down clues to the murderer's identity and trying to stay out of the clutches of Freddy's rival gang. Under Witherall's supervision, the group solves the murder and forces a confession from the murderer just in time to save Jones from the police.