At the age of 8, Park Joo-Hyeong went to Italy after being adopted. He is now an adult and has the name of Vincenzo Cassano (Song Joong-Ki). He is a lawyer, who works for the Mafia as a consigliere. Because of a war between mafia groups, he flees to South Korea. In South Korea, he gets involved with Lawyer Hong Cha-Young (Jeon Yeo-Bin). She is the type of attorney who will do anything to win a case. Vincenzo Cassano falls in love with her. He also achieves social justice in his own way.