After knowing her real mother, Irene, disturbed by the changes in his life, he clings to the friendship that binds to Sherlock and Arsene . In early summer, after the call girl, the trio meets in Davos -Platz, the magnificent background of the Swiss Alps . Behind the quiet bustle of the holiday-makers, however, hides an international intrigue . In a climate of suspicion where no one is what it seems, Irene and her friends find themselves involved in the plots of a great crime, and with a daring expedition to the gloomy castle overlooking the valley will push him to show his cards .
