Since being bounced from the Boston police for insubordination after six years of service, Carlotta Carlyle has set up shop as a private investigator ready to deal with anything from lost pets to substantially grander larcenies. Though Carlotta, a six-foot-tall, redheaded ex cop, part-time cabbie, and neophyte private eye, works out of her home, it's rare that clients stop by unannounced. Especially clients like the genteel, reserved, elderly spinster Miss Margaret Devens. With cash flow problems and a caseload so light that she's taken to reading her cat's mail, Carlotta accepts the case of Miss Devens's missing brother Eugene. Oddly enough, Carlotta knew Eugene when they worked together back at Green and White Cab. As far as Carlotta sees it, this case should be a pinch - until two thugs looking for money send her client to the hospital. The old lady's missing brother seems to have been involved in something much more dangerous than simply driving a cab. Carlotta is determined to do whatever it takes? Work the cops, pose as a hooker, and even drive a cab again - to find Eugene before it's too late.