Five Fingers (2012)

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In Ha is the son of a talented pianist, and dreams of taking over his family's business. But when one day his father brings home an illegitimate son, Ji Ho, and declares that he will be the heir to the family business, In Ha’s world is shattered. In Ha's mother hereby want's revenge and uses JiHo, while playing the goodnatured mother in front of him. Ji Ho grows up to be a pianist prodigy and the heir to his family's business. He loves his stepmother and stepbrother In Ha more than himself and only wants the best for them. But when he finds out the secrets, lies and plots which have used on him, he vows to revenge on the people who he once thought was his closest family.