Sword Master (2016) on Netflix

Plot summary

Yen Shih-San, a swordsman and assassin, has spent his life in the shadow of the Third Master, Hsieh Shao-Feng. Mu-Yung Chiu-Ti, who says Shao-Feng left her at the altar, asks Yen Shih-San to kill him; he refuses the contract but sets out anyway, looking for the one opponent he has never beaten. Yen Shih-San is also dying, of an ailment no medicine reaches. He carries a pill that heals any wound except his own illness. In a brothel, a drunken stranger who will not give his name is put to work as a servant and nicknamed Ah Chi. He steps in when Hsiao Li, the lowest-status of the prostitutes, is cheated by her customers.