Polo leaves his San Francisco home base to do a favor for an old friend. It sounds simple enough: Fly to London to hand deliver a letter, a check, and a cassette tape to a distant cousin of Polo's friend Raymond Singh. With first-class plane tickets, a hefty expense account, and reservations at the Ritz, how can he refuse? Raymond's cousin Gurbeep Singh proves elusive, though, and in the process of tracking him down, the persistent detective runs into several nasty situations. As Polo delves deeper into Gurbeep's affairs, a dark picture emerges. Undeterred, he continues an investigation that takes him from London to San Francisco and Canada and into the vicious underworld of pornography, smuggling, kidnapping, and murder.