Aum is the youngest of 4 brothers (if I remember well...) his family was too poor so his parents decided to give Aum to a rich couple.
When he discoveres that he was adopted, he went back to his hometown because he wanted to meet his real family but he got robbed and he lost his memory. His real mother took him in without knowing that Aum is her son, and then he helps his brothers rebuild their family business.... without knowing that they are brothers...
As for Aff and Bua, they are sisters. Aff is prim and proper, very kind-hearted, whereas Bua is sassy, who likes wealth and who looks down on the poors, but she ended falling for Aum, who has nothing...
I like this lakorn, it's a very touching one.
