Song Xiaoxiao and Gu Cheng are forced into marriage by their grandmothers, but both escape the wedding for their first loves. Song Xiaoxiao asks her gay best friend Qin Ran to dress as a bride to replace her, while Gu Cheng accidentally escapes in a bridesmaid dress. Meeting in the basement without recognizing each other, Song Xiaoxiao even helps Gu Cheng escape. Unbeknownst to them, they are each other's childhood sweethearts. Two years later, Gu Cheng returns with three missions: find his first love, divorce Song Xiaoxiao, and find a suitable international relief supply company. To prevent their divorce, grandmother lies that Song Xiaoxiao is pregnant, making Gu Cheng think she cheated. Through multiple encounters, Gu Cheng mistakes Song Xiaoxiao for the person who helped him escape, not knowing she's his wife. He eventually mistakes Qin Ran for his wife. Song Xiaoxiao discovers the company she's competing with is Gu Cheng's and hides her identity while refusing divorce. As their relationship becomes ambiguous, just when they're about to recognize each other, Jiang Mei poses as Gu Cheng's first love at a bidding dinner, making Song Xiaoxiao retreat. When the fake pregnancy is exposed, Gu Cheng is happy. His lie about liking men is also exposed, clearing up the misunderstanding about Qin Ran and recognizing Song Xiaoxiao as his bride. When they're about to be together, Jiang Mei's fake identity stands between them again. Gu Cheng exposes Jiang Mei's lies and plans to remarry Song Xiaoxiao, but she has gone abroad for international rescue work. Gu Cheng chases her to a war zone where they reunite. In the chaos, Song Xiaoxiao is injured and Gu Cheng saves her, leading to their wedding. However, the truth is that Gu Cheng's eyes were injured in the bombing, causing blurred vision. He didn't save Song Xiaoxiao but a foreign woman in similar clothes. The final wedding is just Gu Cheng's fantasy, while Song Xiaoxiao sacrificed herself for the great rescue mission.
