Kong Ji Hyeok leads the “Mother TF” team at a baby products company. Known for his sharp mind and calm leadership, he carries out his work with quiet passion and precision. His steady life is shaken when a team member, Ko Da Rim, unexpectedly kisses him — putting him in a complicated position, especially because he believes she is married.
Ko Da Rim, however, is not married at all. A single woman struggling to make ends meet, she lies about being married with a child in order to secure a temporary job at the company. Working under Kong Ji Hyeok, her initial goal is simple — to become a permanent employee. Yet as they spend more time together, she finds herself developing unexpected feelings for him, blurring the line between truth and deception.