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Kim Ji Hyuk is a poor orphan who has no money or connections in the world, that is until he suddenly discovers that he is the chaebol of a rich family, the HyunSung Group. When he discovers the truth that it was all a conspiracy to steal his heart as a transplant for a failing family member, he decides to take revenge on the family, including their true son and heir, an outwardly congenial man who is actually a two-faced, cunning rival.