One day, Yong picks up a picture book and turns to an overpowering picture of boundless sea. The owner of the book, Hui, is a transfer student from Taipei. She makes Xian flip it at first sight. Striving for the beach they dream of, Yong, Hui and Xian launch a serious “beach project.” They save money bit by bit and hope to embark on the journey before the eve of graduation. However, the need to cram for exams in school drives Xian mad. At the end of the semester, there is no short distance to meet their goal. Will they leave for their dream beach while their “childhood” ends?