Part Time Boston cabbie and PI Carlotta Carlyle has been hired by a rival cab company to investigate a series of attacks targeting Boston area cab drivers. It seems somebody is after their medallions. Then Carlotta discovers hidden microphones in the garage at the taxi company she works for. But when she brings it to the attention of Sam Gianelli, the company's co-owner and Carlotta's off-again, on-again lover, he doesn't want the microphones disturbed. But he won't say why. Just when Carlotta thinks things can't get any more mysterious, she is almost killed in drive-by shooting when she is picking up her new personal computer, which she bought from Sam's friend. Was it a targeted hit, or a random drive-by? And why has Sam's friend suddenly disappeared? When Carlotta is asked to look deeper into the robberies that are now causing drivers to quit in record numbers, the danger escalates as she stumbles upon a secret that could change her life forever - that is, if she can stay alive.