老師帶著大家參觀美術博物館，頑皮的同學趁著管理員不注意，在珍藏品上畫怪獸，所有的警察一起追趕他，大家一起追趕跑跳砰啦！ What all can happen during an ordinary school visit in museum. A small boy experience big adventure due to his mischief.