Emily, a café worker who caught the groom cheating with the bridesmaid, decides to marry James, the paramedic who saved her life, in a flash marriage to complete her dream wedding. However, she doesn't know that James is the former billionaire CEO and the sole heir to a wealthy family. Emily, who had sworn never to get involved with rich people again, unknowingly falls in love with James, who is pretending to be an ordinary paramedic.