Adopted daughter and principal collaborator of James Fitzroy, roving ambassador and special correspondent for the American Secretary of State in Europe, Susan is a clever, multilingual young woman. In the eyes of her attentive father she appears perfectly happy, but this too-perfect image hides many faults, sorrows and mysteries. Trapped by her past, Susan will have to play her most dangerous role in a life already rich with adventure: Lady S - a high-class spy in a diplomatic environment.