For the unlikely crime-busting duo Leo and Serendipity, a missing dog is only the start of their troubles... Leo Bloodworth, 'the Bloodhound', is a world-weary L.A. gumshoe with a reputation for finding anything - and a low tolerance of precocious teenagers. Serendipity Dahlquist is a precocious teenager. When the headstrong, roller-skating fourteen-year-old asks Bloodworth to help track down her lost dog Groucho, it leads this oddest of odd couples into the dark criminal underworld of the Mexican mafia, and into more trouble than they'd bargained for.