Caroline, a hardworking cleaner with a high school education, shares a night of intense passion with reclusive CEO Sebastian. Sebastian, mistakenly believing she was the high-society woman he was supposed to meet, vows to take full responsibility. However, a twist of fate reveals that Sebastian’s stepmother has already arranged a marriage for him—to none other than Caroline, the lowly cleaner. As they are forced into a domestic life, Sebastian struggles with the collision of his obsession with the 'mystery woman' and his disdain for his 'uneducated' wife. Little does he know, they are one and the same. Will he discover his sweet wife's secret before his obsession drives them apart?