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.

Ji Sun Woo is an associate director of a family clinic with a perfect life—a great career, married to a handsome, young-looking man, mother to an adoring son, and surrounded by seemingly caring friends. She couldn't be more content. Lee Tae Oh, her husband, is an aspiring movie director. However, when his temptation leads him to betray Sun Woo along with the people around her, she gets driven to revenge. The perilous twists-and-turns of a married couple's life unfolds.