When Lee Dong Cheol was a child, his father died. His father's death was masterminded by a cruel man, Sin Tae Hwan, in order to stop the coal miner union strikes. From then on, Lee Dong Cheol vows revenge. Little does he know, however, that whom he believes is his younger brother is actually the biological son of Sin Tae Hwan. Lee Dong Cheol's biological brother was switched at birth with Sin Tae Hwan's son by a nurse seeking revenge on Sin Tae Hwan.