At the age of eight, Park Joo Hyeong left for Italy after being adopted. Now an adult, he is known as Vincenzo Cassano and employed by a Mafia family as a consigliere. Due to warring Mafia factions, he flies 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 unrivalled conglomerate a taste of his own medicine—with a side of his own version of justice.

Story of two best friends Lu Ke and Shen Si Yi, who has contrasting personalities but are each other's closest friends. Their relationship broke down during graduation but nine years later they meet and reconcile. The two encouraged each other, faced difficulties, and overcome the setbacks in work and life together.