From half way around the world, American Clare Sullivan obeys a desperate summons from her glamorous sister Gina and flies to Paris. But when she arrives, there’s no sign of Gina. Her sister’s trail leads Claire to London and to Garth Cooper, a boyfriend of Gina’s, who seems to have a secret to hide. As time passes, Claire begins to understand that Gina’s disappearance is not just another one of her sister’s melodramatic stunts.