The Foggy, Foggy Dew

Andrew Mallory, an anthropologist, is home from his work in the Pacific Islands. At a gathering he overhears the obscure language of the Islands; it's being used as a code. A young girl is killed for having heard it as well. He had no idea who had murdered Seraphina. Who could want to murder so young and pretty a little girl? Fifty refugee children's lives are at stake; is Emmi, the woman he's fallen for, one of the spies?