Shin Tae Hwan, the son in law of one of the country's leading group has now taken over to lead the nation's coalmine union and planned an explosion to eliminate the elite miner Lee Ki Chul who is against him. After the death of Lee Ki Chul, his wife Yang Chun Hee gives birth to a boy. At the same day, Shin Tae Hwan's wife gives birth to a boy as well. The nurse Yoo Mi Ae takes revenge by secretly swapping the two baby. (Source: Viu)