The story
One night stand, one horrifying morning. The woman is her new stepsister.
After a drunken night together, Shirley discovers her lover Sophia is her stepsister, and tries desperately to keep her distance. Sophia pursues her anyway, bold and reckless, nearly caught by their blended family more than once, until Shirley gives in to a forbidden secret romance. A jealous classmate sets them up and drives them apart, and when hitmen abduct Shirley she learns Professor Sophia is secretly an underworld kingpin. They reconcile, only for Sophia's first love to come home, and they have to stand firm against every prejudice to stay together.