Following the death of her mother and overwhelmed by financial troubles, Soui agrees to an unconventional arrangement: to act as Chihyuk's fiancée in return for money and the opportunity to escape her past's constraints. Initially, what starts as a practical relationship slowly evolves into a more complex emotional connection, intertwining calculated affection, dependence, and a hidden desire that complicates their lives. However, as the deception approaches its conclusion, they both discover that emotions stemming from a lie can prove to be far more perilous than the façade they have maintained.