At a theatrical party in London Grant briefly encounters a young American, whose connections as a famous photographer grant him an invitation to stay at the home of a well-known writer in an English village that has become fashionable among the artistic set. A few days later Grant is called in when the American has disappeared, mostly likely into the river. What at first seems a routine case of accident, or at worst murder, becomes for the detective a more complexinvestigation of identity as he begins to ponder whether any accident or crime has taken place at all.