In the world of Karakuri Circus, Narumi Katou battles the peculiar ZONAPHA Syndrome, a condition that triggers debilitating seizures unless he witnesses someone's laughter. One fateful day, Narumi encounters a young boy, Masaru Saiga, who seeks refuge from sinister relatives aiming to seize his inheritance. Standing against formidable foes, Narumi and Masaru face sentient puppet adversaries with extraordinary abilities. Their perilous encounter takes an unexpected turn when a silver-haired girl, Shirogane, emerges as Masaru's protector, revealing a complex web of ancient conflicts and the entwined destinies of individuals from diverse backgrounds as they delve into a saga of love, betrayal, and the enduring struggle between mankind and puppetry.