Mary is always neat and organized, while Harry is horribly messy. But even Mary’s carefully planned schedule can’t help when things go wrong at her own birthday party.

The party is supposed to start with the kids from Room 3B taking an exciting train ride, but when their train is delayed not one . . . not two . . . but three times, Mary’s plan is completely ruined! She thinks the only thing that can make her feel better is cup after cup of sugary Island Punch—even after her mom tells her to stop.

But what Mary doesn’t know is that Harry has his own wacky ideas for saving Mary’s big day. Can the kids still have fun even when nothing’s going the way it’s supposed to, or will this be the most horrible birthday ever?


瑪莉做起事來總是有條不紊，但哈利則是一塌糊塗。但連瑪莉精心策劃的生日派對，也無法應付天外飛來的橫禍。

本來預計派對一開始要和 3B 的同學搭火車出去，但沒想到火車卻一而再再而三地誤點！瑪莉原本的計畫全毀了！瑪莉心想只有潘趣酒一杯接著一杯才能消除心中的憂愁，即便媽媽阻止她也不管。

但瑪莉卻不知道哈利的一些鬼點子能幫她挽救這場悲劇。現在所有計劃都亂了序，這群孩子還能歡慶派對嗎？還是會演變成有史以來最慘的派對呢？