When the vertically-challenged Johnny Naples entrusts Tim Diamond with a package worth over three million pounds, he's making a big mistake. Tim Diamond is the worst detective in the world. Next day, Johnny's dead, Tim feels the heat, and his smart younger brother, Nick, gets the package—and every crook in town on his back! After his older brother, a fledgling private detective, agrees to safeguard a package for a dwarf who does not live long, thirteen-year-old Nick scampers to solve the mystery while also trying to stay one step ahead of an assortment of thugs.