The relationship between two families begins with the friendship of one's daughter and the other's son. As time goes on, Namkhing and Foon's friendship morphs into first love. Spending increased time together, they eventually have the cahnce to take a family trip together.
Soon, the relationship between Namkhing's mother Chayanut and Foon's father Sahat crosses a line. Both families are shaken by the realisation that Chayanut and Sahat had had an affari resulting in a pregnancy. Despite it all, the couples chose to stay by each other so as not to break up their families.