Soiinthanin is a beautiful, smart, well-educated girl, who is the daughter of Saengfah, who owns the "Yupharet" house. But because her mother is only a mistress, and she is an illegitimate child, she spends her life in their house being oppressed and not experiencing the same privileges her half-sister Soifah gets. The miserable and painful life of her mother is not lost on her as she too finds herself facing the same fate when she falls for Soifah's fiance Phas, a man who has to marry her half-sister in order to maintain his noble family's honour.
Jane and Lalisa were born on the same day and are step-siblings. Their father died while serving in the police. Lalisa's mother treated Janenaree as her own child. Together with their younger brother, they formed a close sibling bond. Over time, Lalisa and Janenaree entered the SIC special training unit. Both were sent to train with Inspector Non. The young police officer who visited the Royal Thai Police and is admired by the commanding officers in the agency. Non chooses Darin as his new assistant. But, after the death of Darin during a chase with drug dealers, he gets dejected and resigns from the police. But Commander Kajorn still wants him to continue working. Amid the approval of Captain Kajorn, who saw the potential of Janenaree, sent her as Non's new assistant. But Lalisa misunderstands that her sister will take Non from her. Will both Janenaree and Lalisa reconcile or continue with rivalry? Will inspector Non be able to catch the main mastermind behind the drug cartel?