Min-Kyu (Yoo Seung-Ho) is the largest shareholder of a finance company. He is handsome and intelligent, but he lives in seclusion due to his allergy of people. Meanwhile, Ji-A (Chae Soo-Bin) is an aspiring entrepreneur and works as a personal shopper. She receives a phone call from her ex-boyfriend Baek-Gyun (Uhm Ki-Joon). Her ex-boyfriend is a world renown developer of android robots. His latest creation is the android Aji 3, which he built with the same physical appearance as Ji-A, but an accident has broken Aji 3. 

Making matters worse, he has received an order for Aji 3 from Min-Kyu with the promise of more investment money if he's satisfied. Being in such a predicament, Baek-Gyun offers money to Ji-A if she will go to Min-Kyu's home and pretend to be Aji 3. Ji-A is in need of money and accepts the offer.