Opening in England at the turn of the twentieth century, "C" is the story of a boy named Serge Carrefax, whose father spends his time experimenting with wireless communication while running a school for deaf children. Serge grows up amid the noise and silence with his brilliant but troubled older sister, Sophie: an intense sibling relationship that stays with him as he heads off into an equally troubled larger world. After a fling with a nurse at a Bohemian spa, Serge serves in World War I as a radio operator for reconnaissance planes. When his plane is shot down, Serge is taken to a German prison camp, from which he escapes. Back in London, he's recruited for a mission to Cairo on behalf of the shadowy Empire Wireless Chain.