Tiaoleng, a wealthy businessman in Phuket, is mysteriously murdered. His grandson, Chalumpol, returns to uncover the truth behind his grandfather's death.

In the midst of the investigation, Chalumpol crosses paths with Nampueng — a woman he once knew and had feelings for. But now, she carries a shocking new title: his young step-grandmother. As secrets unravel, so do forbidden emotions that challenge both love and loyalty.