“Darling, you are the moon that gave light in my darkest times.” Giving up to find a man who could make her heart skip a beat and fall in love, Hailey Hillson accepted her best friend’s marriage proposal, and then she relented after hearing from another woman saying she couldn’t please a man in bed. When it was just a week away from their wedding day, Bryan got back together with his ex-girlfriend Eva Lan. Hailey broke up with Bryan and called off their wedding. But then, she discovered an interesting fact about Eva Lan—she is married. ‘Didn’t her husband know she cheated on him?’ After her heartbreak, Hailey focused on completing her life project. To achieve it, she went abroad where she came across the CEO of Shen Group Construction Firm, Vincent Lopez Shen, who offered her a contract later to pretend as his mistress to get his wife's attention. As she has also had an ulterior motive, she signed it without thinking twice. But what will happen after she lives with Vincent on one roof when he is Eva’s husband—the woman who destroys her relationship with Bryan?