Ga-Jang No, a man of strength, dedication, and humility, deeply reveres martial arts. Following his wife's tragic passing, this hired muscle seeks a simple job to care for his three young children. Content with guarding and thwarting novice combatants to ensure his nightly return home, he faces a new test when a sinister cult kidnaps city children. Ga-Jang is compelled to unleash his latent warrior abilities to confront this ominous threat.