Junie B. Jones 的班上即將舉行班親會，而他們也將演出哥倫布發現新大陸的戲劇，其中Junie B決定要當跑得最快的船，而她的死對頭May也同樣是扮演船，這下子他們二個在正式表演時會有什麼脫軌的表現嗎？這場戲最後會如何收場呢？適合8歲以上兒童閱讀。
Room One is putting on a play. And guess what? It’s about explores looking for the New World! And there’s ships and sea captains and everything! Plus here’s the bestest news of all—Junie B. Jones thinks she might be the star of the whole entire production! Only , sailing the ocean blue is not as easy as it looks, apparently. “Cause problems keep on happening. Like the actors keep catching the flu. And bossy May keeps trying to take over the show. Can this play be saved? Or is Room One in for a disaster at sea that they will never forget?