Mia Luang follows a wealthy and respected couple whose perfect marriage is just a facade. Aniroot, the charming but unfaithful husband, has many mistresses, while his wife Wiganda quietly endures the humiliation. Among them, only Ornin dares to openly challenge Wiganda’s place. In Thai tradition, the main wife is called Mia Luang, while the mistresses are Mia Noi—and this story is a battle between the two.