P.C. and Mac are thrilled when Mac's dad invites them to join him on a business trip in Monaco, where he will be a speaker at the International Psychiatric Association Conference. They spend the beginning of their trip having fun: seeing the sites, relaxing on the beach, and eating at cafes. But their vacation fun is interrupted when Harriet Epstein-Hopper, who is also attending the conference, is murdered, apparently by a vicious serial killer known as Cyrano. Even though Mac's father warns them not to get involved, P.C. and Mac can't help themselves. Along with Juliette, the inspector's daughter, they determine to find out who really is responsible. Anyone who enjoyed the first two P.C. Hawke Mysteries is sure to like this one as well.