The following content is intended for mature audiences and may contain sexual themes, gore, violence and/or strong language. Discretion is advised. Deep in the mountains is a village that offers prayers to the mythical Asura/Sura in order to stay protected. Doctor ‘Cho-ah’ who lives in the doctor’s town ends up saving a mysterious man named ‘Mujin’. This encounter marks the end of Cho-ah's peaceful days as he gets caught up in a whirlwind of events.