In a world steeped in darkness, "The Heartbound Centipede" follows the harrowing journey of Zheng Li, an ordinary office worker who meets an untimely death—choking on a candy bar during a mundane lunch break. Instead of finding peace in the afterlife, Zheng is reborn as a helpless infant in the Crimson Mantle Sect, a small but cruel cult known for kidnapping mortal babies to mold them into ruthless cultivators.