A Fist Within Four Walls(2016)

A Fist Within Four Walls is a Hong Kong action series following Chor Au-kuen, a man haunted by his family's death who returns to the walled city seeking his missing sister. He discovers his childhood home has descended into lawlessness and chaos. Adopting a false identity, Au-kuen befriends a spirited hair salon owner, a dentist, and a laborer as he navigates the crumbling district. Determined to restore order, he rallies the locals to form a resistance against the criminal elements controlling the area. His efforts to unite the community pit him against an underground fighting champion, igniting a dangerous conflict. Caught between his personal quest and his mission to save the walled city, Au-kuen must confront both the forces threatening his home and the secrets of his past.