Level seven government worker Jeong Ha Na’s dream is to retire peacefully, but her feisty attitude lands her in the Marriage Promotion Team at Injeong City Hall, a role she finds baffling as she doesn’t believe in marriage herself. To make matters worse, her ex-boyfriend Ki Jun, whom she nearly married three years ago, appears as her new team leader, adding to her disbelief. Desperate to escape the team, Ha Na is tasked with marrying off local bachelor Cheol Hee. Though Cheol Hee initially refuses, believing he’s not suited for marriage, Ha Na’s determination gradually softens his heart. As they open up to each other, Ha Na and Cheol Hee, who both doubted their worthiness of marriage, find themselves questioning if they can take the plunge after all. Will Ha Na and Cheol Hee finally gather the courage to believe in love and marriage?