Yah Leum Chan is a love story between a young man and a young woman during college. "Forget me not" is the flower of love and promise. Before saying goodbye, Khemachad gave Suriyawadee a flower ring engraved with the words "Yah Leum Chan" (Forget Me Not) to remind their hearts of the saying "We will have each other forever, forget me not. If you still love me, then wear it with you, but if this love is ruined, then please take it off." Wadee met with a family crisis, so she had to quit school and marry an elderly man. She married him only in name because he wanted her to marry his son, but his son refused, so he married her instead. His son later regretted this decision when he realized that he missed his most important chance. Wadee disappeared from Khem's life without saying goodbye, causing him great despair. When he found out that she married a wealthy man, he turned into a vengeful person.