Piraya (Sammy) is the oldest daughter of Peeradayt and Mattana. Her father works as a government official while her mother owns her own jewelry business. Panat (Thanwa) is the oldest son of Preemsuda who works as a secretary for Piraya's father. Piraya and Panat are lovers who decided to get married quietly in a plain and simple wedding in Spain. After their honeymoon, they both returned home to find that Pasin (Prach), Panat's younger brother, was staying with Pasika (Cat), Piraya's younger sister. The two had fallen in love with each other. However, Panat carries the burden of a deep, dark secret that he cannot reveal. He was so stressed by it that he decided to tell Pasin the truth. Pasin cannot love Pasika because Pasika is his half-sister. Their mother had secretly been the mistress of Piraya's father for a very long time. Therefore, Pasin is the illegitimate child of Preemsuda and Peeradayt. As for Panat, he is fathered by a different man. Nonetheless, their secret did not remain a secret for long after Piraya and Pasika found out that Pasin had the same last name as them. Piraya was deeply angered at Panat for keeping the secret about his mother being her father's mistress from her. This had gone on for a very long time. For that reason, she decided to sever ties with him. Afterwards, Pasika called her mother in Bangkok to tell her about the incident. Mattana then went on to vehemently confront her husband and Preemsuda to the point where she went into shock and became insane. Pasika could not accept the current broken state of her family so she ran away from home and disappeared without a trace. Their father then went on to abandon their mother and moved in with Preemsuda. He despised Panat for having relations with his daughter, which eventually lead to his secret being revealed. In order to get away from their current problems, Panat and Pasin decided to further their studies by going abroad while Piraya had to look after her mother and her family's faili