Peng Xiao Qian is a commoner who lives in a life of running away for debtors because her father was a huge gambler. She gets small jobs, such as tour guide, to make a living and is a very good liar. One day, she gets a temporary job as a Chinese-Korean translator for the CEO of a hotel, Shao Feng. They meet several times afterwards, Shao Feng finds himself dealing with a liar and cheater. However, he offers her to become his fake cousin to help save the life of his grandfather. They will become cousins and live under the same roof. How will their relationship develop as they get closer and closer?
When Gong Chan meets the lively and beautiful Yoo Rin, he finds out that she has connections to his missing cousin, whom his grandfather has been searching for. He asks Yoo Rin to lie about being his long missing cousin until he can find his real cousin. She says yes, but soon their feelings for each other get in the way of their plans. Gong Chan’s friend, Jung Woo falls for Yoo Rin while Gong Chan’s ex-girlfriend, Seo Hyun, a pro tennis player, tries to win him back. Will the two ever tell each other how they feel? Will Gong Chan ever find his real cousin?