Jang Min-gi has spent his life hiding a secret: he can see the dead. When his estranged father — the last in a line of Kokdu, ritual guardians who escort souls to the afterlife — dies under mysterious circumstances, Min-gi inherits both a worn puppet kit and a burden he never wanted. Drawn into a thirty-year-old betrayal surrounding a burned funeral bier, he must confront an imprisoned soul demanding vengeance.