Sunnyside opens on a winter day in 1916 during which Charlie Chaplin is spotted in more than eight hundred places simultaneously, an extraordinary delusion that forever binds the overlapping fortunes of three men: Leland Wheeler, son of the world’s last (and worst) Wild West star, as he finds unexpected love on the battlefields of France; Hugo Black, drafted to fight under the towering General Edmund Ironside in America’s doomed expedition against the Bolsheviks; and Chaplin himself, as he faces a tightening vise of complications—studio moguls, questions about his patriotism, his unchecked heart, and, most menacing of all, his mother.