The story of Kim In Sook's battle against all odds to rise to the top of JK Group with the help of the lawyer Han Ji Hoon, a man whom she has supported since his childhood. After marrying into a chaebol (wealthy business) family, Kim In Sook's life becomes a living hell. Looked down on by her in-laws as a gold-digging intruder, she's ignored and backstaged for years. When her husband is killed in a helicopter accident, her mother-in-law takes her son away. Enter Han Ji Hoon, the powerhouse new lawyer of the family, who knows In Sook from the past. Ji Hoon becomes determined to put a stop to the oppressive situation she's been in for 18 years. When In Sook finally decides that she has had enough and launches a bold plan to take over the family company, Ji Hoon will be there at her side, no matter what it costs him. The two begin to play a dangerous double game.