Hailey catches her arrogant fiancé engaged in a sleazy affair on the eve of their high-profile nuptials, prompting her to cancel the ceremony on the spot. Desperate to counter family pressure and preserve her autonomy, she impulsively offers a lucrative temporary marriage deal to Ethan, the handsome young driver who picked her up outside the venue.
Unbeknownst to Hailey, Ethan is actually the reclusive heir of the capital's paramount business dynasty, playing driver on a dare. As Hailey utilizes her secret pharmaceutical genius to save Ethan's ailing sibling, their comedic mutual secrets unravel, turning a fake arrangement into a passionate alliance against their snooty former flames.
