Literary young woman Ye Lan encounters the wedding host Xiao Yi at her sister Ye Yun's wedding, and the two develop a secret love. But Ye Lan already has a boyfriend Shen Yumo who has been dating for more than four years. Because Shen Yumo is too caring, Ye Lan feels dull and depressed, and is full of fear of their marriage. One day, Ye Lan learned that Xiao Yi was going on a trip, so she proposed to go with him. Various things that happened during the trip changed Ye Lan's mood...