Shin Ha-ri, a food researcher, agrees to go on a blind date in place of her wealthy best friend, Jin Young-seo, with the intention of scaring the suitor away. However, the plan backfires spectacularly when the suitor turns out to be Kang Tae-moo, the charismatic and workaholic CEO of the company where Ha-ri works. To avoid further pressure from his grandfather to marry, Tae-moo decides to propose a fake relationship to the woman he believes is Young-seo. As Ha-ri struggles to maintain her double identity to protect her job and her friend, she finds herself entangled in a web of lies and genuine feelings. The series explores the complications of workplace hierarchies, family expectations, and the thin line between a business arrangement and true love, all while balancing comedic misunderstandings with heartfelt romantic development.