In December 1919, Ambrose Small, the mercurial owner of the Grand Opera House in Toronto, closed a deal to sell his network of Ontario theatres, deposited a million-dollar cheque in his bank account, and was never seen again. As weeks turned to years, the disappearance became the most "extraordinary unsolved mystery" of its time. Everything about the sensational case would be called into question in the decades to come, including the motivations of his inner circle, his enemies, and the police who followed the trail across the continent, looking for answers in asylums, theatres, and the Pacific Northwest.