Jiang Bei and Shen Nanzhi's marriage has reached its end. They decide to part ways peacefully and wish each other happiness. Unexpectedly, after falling asleep, they both return to the summer after their college entrance exams. Given a second chance, neither wants anything to do with the other. But to their surprise, their fraternal twins have traveled back in time with them. The two little ones firmly believe they've arrived in the year their parents were eighteen. Their excitement soon gives way to an important realization: if Mom and Dad don't get together, they'll disappear too! They launch a frantic matchmaking campaign, completely unaware that their parents have been reborn with their memories intact and recognized them at first sight. The couple silently understands each other without saying a word.