At the age of eight, Park Joo Hyeong went to Italy after being adopted. He is now an adult and known as Vincenzo Cassano to the Mafia, who employs him as a consigliere. Because mafia factions are at war with each other, he flees to South Korea, where he gets involved with lawyer Hong Cha Young. She is the type of attorney who will do anything to win a case. Now back in his motherland, he gives an unrivaled conglomerate a taste of its own medicine with a side of justice.
(Source: Netflix, AsianWiki)