Choi Sulli finally managed to find the address of Choi Siwon, the only sibling who does she has, after years of tracking. One day, Sulli at his front door confidently and knocked it. Sulli had no idea that she would enter a tragic family drama, full of intrigue, but it’s also full of exciting ferment, which she had never known before.

Minho, a government agent who worked at the Ministry of Finance, suspicious when suddenly a beautiful woman came to the house of Choi Siwon, and claiming to be his biological sister. Minho is set her up, trying to figure out who really she is. But the opposite happened. Minho is usually put the duty and ratio above of all, breaking all the rules that he compliance. He is powerless when against of Choi Sulli’s charm.