This is a story of two close families that promised and agreed of their children's marriage before they were born. Madam Lamphao, the head of Wichanee family, has two daughters: An elder daughter called Rojanasnai and her youngest Romereuthai. The elder sister already has a lover named Prawut Wuttisak. While Madam Preme, the head of Pathamakul family, has only one son called Paat Pathamakul. When the time came and the youngest daughter Romereuthai learned that she had to marry a son of her mother's friend, she was dissatisfied and opposed it because in her opinion Paat is a rustic, old-fashionable fool. So she forced her sister to marry him instead but Rojanasnai also defied it since she had her lover. In order to get her sister consent to get married Romeruethai used her last choice by revealing the truth that Rojanasnai was not her biological sister but an orphan that her mum adopted at the very young age. Overwhelmed with consciousness of gratitude Rojanasnai finally accepted the ma