At the age of 27, agent Brüschweiler found herself in a very tough position when she was appointed to spy on the Kim's legacies. There was a rumor that the Kims are one of the biggest operators in the underground business and she needed to gather evidences to put them in bars. It wasn't a difficult task for her because she's already a part of the Kim's inner circle since childhood; the hard part is breaking their trust for her selfish ambitions. Eight years ago Lalisa left Seoul and studied in England to pursue criminal law, she left the country with a broken heart to mend. She was a hopeless romantic that believes in destiny, so when a pair of soft lips descended on her mouth to give her lungs an air from almost drowning in the lake at their school's youth camp, Lisa didn't bother whether if she's in a near death experience or not because that time she was so convinced that she had found her soulmate. But Lalisa assumed too soon because in highschool on their graduation day, her best friend Jennie invited her to come on her brother's newly build club and there she drunkenly confessed her feelings to the Kim's middle child. Kim Taehyung stared at her for a long time before muttering those cold words that shatters her world. "I'm flattered. But I can't reciprocate your undying love, Brüschweiler. I don't have a heart to offer." Now that Lalisa's back, she will not only bring revenge to him but also she will show him that he has indeed a heart and she ought to break it.