In the Korean detective series "Flower of Evil," the focus is on the married couple, Baek Hee-sung and Cha Ji-won. They give the impression of being the perfect couple. They have a beautiful daughter who adores her parents. However, things are not as they seem at first. It turns out that Hee-sung is hiding his true identity from his wife. Ji-won works as a detective and, along with her colleagues, investigates a series of murders, only to realize that her husband is somehow connected to them.