"Romance is dead." Or so says Pamela Green, a middle-aged romance novelist suffering from writer's block. Then, as she crosses a bridge over the Thames in London, her unsettled life collides with that of a ragged young man who has survived for months on London's streets, getting by on his wits . . . and his looks. Under extraordinary circumstances, Pamela invites him into her comfortable suburban home. There, in spite of their obvious differences,...