Plerngrit, or simply Plerng (played by Mario Maurer), 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 owner of Thai Diamonds Company, or Phet Thai. Twenty years back, Pipat fell in love with Pongpaew, a poor woman who Khun Ying Tongtraa despised. Pipat was given two choices: stay with his mother or leave the house and go with Pongpaew. He chose option number two and lived a peaceful life in Ranong with his family.
For twenty years, Plerng’s parents hid the truth from him. However, one day, Khun Ying Tongtraa fell ill and ended up in the hospital requiring immediate heart transplant. The news spreaded throughout Thailand and reaches Pipat. Pipat finally decides to tell his son the truth and the family travels to Bangkok to visit Khun Ying Tongtraa in the hospital and apologize for his actions twenty years before. On the way, they get into a wreck and Plerng’s father dies on the scene. Plerng and his mother, Pongpaew ended up in the same hospital as Khun Ying Tongtraa. When Plerng was conscious, he learned that his father had passed away and his grandmother was at the same hospital. The doctor tells Plerng that his father is brain dead and will never wake up.Plerng didn’t want to see his father in that horrible situation so he decides to let his father go and donate his father’s heart to his grandmother. He made the decision alone because his mother was still in a coma.
While at the hospital, Plerng meets his aunt Bussakon and uncle Niruj. His aunt Bussakon has two children: Anat and Naree. His uncle Niruj has a son named Chanon. Uncle Niruj and Chanon accepts the truth that Plerng is their relative but aunt Bussakon and her children do not like Plerng. They are jealous of Plerng and fear that one day, Plerng will come into the family and take over everything. For that reason, aunt Bussakon tricks Plerng and Niruj to hide the truth from Khun Ying
