In this second book in the series that began with A Solitaire, newly promoted Captain Philip Collier returns to wartime Paris with orders to assist a mysterious Italian spy in undermining the Bonaparte government. He is joined on his second mission by an inexperienced associate whose only qualification is his family connection. Collier must sidestep a series of dangerous obstacles while lacking trust in either man upon whom his life depends. While he is bound by duty, his colleagues will learn that there are limits to The Links of Obligation.