Jao Sua Mua Nim.

Prot is a kind man who lost his memory. He is enlisted to continue acting as the heir of a wealthy family by Paron the real heir, to help find evidence of the betrayal going on inside and outside of the company. Although he is not used to being a hiso, he makes the best of it. Everyone adores him for being a good person while Naet, the fiancee of real Paron also begins to like him and their love begins to bloom.