Baekjo Gongjunimui Heukjo Eommaga Doeeotseumnida

A woman is cursed with a nightly transformation into a black swan due to black magic, while also being a widow with stepdaughters her own age. She embraces her dual life as a duchess by day and a free-spirited lake queen by night, until she encounters a white baby swan who claims to be her child. The swan is revealed to be a human, and the daughter of the tyrant emperor. Despite their differences in feather color, the woman finds herself drawn to the child. They must navigate the challenges posed by the girl’s seven older brothers, including the emperor, as they face their uncertain and complicated relationship.