Some time ago, a famed mega-corporation was exposed for fraud, corruption and countless embezzlements. Since then the heads of the company have all mysteriously disappeared, now their five sons who were once meant to become heirs the fortune are all leading very different lives. However, that changes overnight when all of them discover that on their necks are microchips, called keys, which have been forcefully attached to their skin. Strange text message

That platinum-white hair guy is the mafia boss who is totally a disaster of my life.....

Wonwoo stared, eyes blown wide in horror as he stared directly down the barrel of a gun which was pointed straight at his forehead. The cold wind gently tugged at the edges of his scarf and nipped at his already freezing cheeks, but he could hardly feel anything, already numb from the fear coursing through his veins.