Kim Sa Ra was the daughter-in-law of the biggest law firm in South Korea, but she was betrayed by her husband and lost everything. After that, she began working as a divorce troubleshooter. She is now the team leader at the divorce settlement office Solution. She punishes bad spouses and provides help for those who find themselves in unfair divorce situations.

She works with Dong Ki Joon. He is Sa Ra’s business partner and an advisory lawyer at Solution. Before coming to Solution, he was an excellent prosecutor who had the nickname of "German Shepherd." He picked up the nickname because of his persistence and keen intuition, but Ki Joon left the prosecutors' office for an unknown reason. Sa Ra and Ki Joon work together for people who are suffering through difficult divorces.