And for a few seconds, everyone forgets who is controlling whom.… The old theatre stood at the end of a narrow street in Osaka, squeezed between a concrete apartment building and a bicycle shop. Its sign was almost unreadable. Inside, however, everything was carefully maintained. The stage was only a few meters wide, but behind the curtain hung dozens of puppets—wooden figures with articulated shoulders, elbows, wrists, knees, and fingers. Some had beautiful costumes; others were so old that the paint on their faces had begun to crack. Among them was a marionette named Ren. Ren had been made nearly forty years earlier by a craftsman who had believed that a puppet’s most important feature was not its face, but its balance. A marionette could have exquisite eyes and a beautifully painted mouth, but if its center of gravity was wrong, no amount of skill could make it appear alive. That principle fascinated Haruto, the theatre’s newest puppeteer. His teacher, ...