Wang Apo, a lifelong do-gooder who built bridges and helped the poor, is suddenly and forcibly dragged away by the Black and White Impermanence in the dead of night, falsely accused of evil deeds. Full of grievance, Wang Apo protests again and again, insisting she has never done anything to wrong her conscience, yet her soul is still taken away in chains. As she travels the Yellow Springs Road and nears the Ghost Gate, her heart aches for her unmarried son, and she resolves to go before King Yan in the underworld to plead her innocence and uncover the eerie truth behind this wrongful soul-snatching.