Paitoon is in love with Yupin, whose father has gambling issues. They planned on getting married but Pao, his mother, doesn't like Yupin and won't accept her as a daughter-in-law because of her father. Yupin is then forced to marry Praiwan, Paitoon's brother who has polio since he was born. (Source: MyDramaList)
~~ Adapted from the novel with the same title by author Chulamani.