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? 

調皮的小勇與賢是好朋友。小勇在一次的機緣巧合下看見了新轉學生惠的畫冊，裡頭畫著一片蔚藍色的海洋還有沙灘。小勇更因此與惠成為好朋友，而賢更是被惠的氣質深深吸引。為了可以一起去海邊遊玩，他們展開了一項“海邊計畫”，希望趕在畢業之前可以達成這個願望。就因為這樣，他們無所不計其用的籌錢。眼看畢業在即，他們還是沒辦法達成目標。難道，這願望就只能永遠被埋藏在這童年的回憶裡嗎？