Chor Au-kuen returns to his chaotic childhood home, a walled city now rife with lawlessness, driven by the hope of reuniting with his long-lost sister. Adopting a new identity, he befriends a spirited hair salon owner, a dentist, and a working-class individual. As he seeks to bring order back to the community, Au-kuen rallies his newfound allies to challenge the criminal elements plaguing their lives. However, his efforts lead to inevitable confrontations with a formidable underground fighting champion, complicating his quest for justice and connection.