Bong-sam abandons his sick wife Sun-im and young son Gwi-dong for a rich widow named Yeon-wol. Sun-im dies and Gwi-dong is raised by Yeon-wol, who severely abuses young Gwi-dong. Sun-im's soul, which cannot leave this world, stays to protect her son. She asks Yeon-wol to be a good mother to Gwi-dong...