When the Tsar's eighteen-year-old niece Princess Irina Romanov announced her marriage to Prince Felix Youssoupov, heir to the richest fortune in Russia, the Imperial family were shocked. Prince Felix and his wife Princess Irina had it all. When they married in St Petersburg in 1914 immense wealth and social standing were theirs. But fate had other ideas. In 1916 Felix was involved in one of the most famous crimes of the twentieth century - the murder...