Han Ji Eun (Song Hye Kyo), an aspiring scriptwriter, is stunned when her friends deceive her into thinking she’s won a vacation, only to sell her cherished family home, ‘Full House’, while she’s away. On her trip, she crosses paths with the famous actor Lee Young Jae (Rain), and their comedic interactions lead to an unexpected twist: upon her return, she finds her house has been purchased by him. Despite their clashing personalities – Ji Eun’s disorganized habits and Young Jae’s obsessive cleanliness – they agree to cohabit. Initially working as his maid to buy back her home, Ji Eun finds herself in a contract marriage with Young Jae, meant to make his ex jealous. As their faux relationship deepens, genuine feelings begin to emerge, complicating their arrangement.