 Xavier Lombard is a world-weary private eye in London, in exile from his native Paris; his best friend is Nathalie, a high-class call girl. He gets a call from an old friend from the Paris police department, now a businessman whose brother-in-law is missing. The missing man s parents hire Xavier over their daughter s objections, and quickly he finds himself in the realm of children s sexual slavery. He guesses that the lost son is dead and shifts his focus to finding and breaking this lucrative business of child trafficking. He involves a reluctant Nathalie to hunt "the Austrian," the shadowy head of the business. Violence erupts quickly, and Xavier soon has little more to lose.