Su Wan and her husband, Zhou Siyi, have grown increasingly distant since getting married and decide to end their relationship amicably. On the day they go to complete their divorce proceedings, Zhou Siyi is unexpectedly injured in an accident. After recovering, however, his memories are stuck at the age of eighteen. The once composed and reserved man has become an enthusiastic, straightforward young man who loves sticking close to people and making a fool of himself, and he no longer recognizes his wife. As Su Wan takes care of him, they live under the same roof, where she watches her boyish husband awkwardly try to get closer to her and sincerely show his concern. Through their lighthearted everyday interactions, they get to know each other all over again, clear up misunderstandings, and gradually rediscover their feelings. A heartwarming, healing, and sweet urban romance about two people falling in love again after being apart.