Based on

Movies like Unarmed Combat (2005)

Middle-aged Metal manages a laundry shop. He grows weary of domineering over his weak and timid wife Fendie, as he becomes infatuated with a mysterious young customer, Pingmei, who runs a home-based massage business. Impressed with Pingmei’s massage strength and dexterity, Metal intimidates his wife to join and train for a women’s arm-wrestling contest. Fendie develops an obsession in winning the contest and the tables turn when her strength surpasses Metal.