Plerng is the only son of Pipat and Pongpaew, who lives in Ranong and does fishing for a living. Pipat is actually the eldest son of Khun Ying Tongtraa Chatayothin, the proprietor of Thai Diamonds Company, or Phet Thai. Twenty times back, Pipat fell in love with Pongpaew, a poor woman who Khun Ying Tongtraa despised. Pipat was given two choices stay with his mama or leave the house and go with Pongpaew. He chose option number two and lived a peaceful life in Ranong with his family.
Until one day, Pipat’s mama got ill and he eventually decides to visit her. But they got into an accident in the way. Plerng mama is in a coma and his father is in a vegetative state. After find out that his grandmother is in the same sanitarium, he decides to give his father heart to his grandmother. but her aunt tricks him and made him promise to hide the verity from his grandmother. When his mama awake, they get back living in their city until fate makes him reunite with her grandmother.
