A towering crisis interrupts the twins' usual mayhem: The mayor is about to build his monstrous Knightlorian Hotel right next door! But as they try to halt construction, Edgar and Ellen encounter a new foe -- an unknown prankster who's stealing their thunder (and their best schemes)! To stop the rash of copycat capers the twins must descend into the sewers, but what they discover there is stranger than anything they could have imagined. A mysterious journal, a secret laboratory, a villain's hideaway -- there's a lot more than sewage running beneath Nod's Limbs!


一件大危機阻擾了雙胞胎平常的搗蛋行為－－市長準備在他們家隔壁建造他的奈特羅瑞恩大飯店。

當雙胞胎試著阻止工程進行時，他們遇到了另一個敵人，這個同樣愛惡作劇的人搶先一步執行了他們的計畫（那本來是他們最棒的點子！）。為了阻擋突如其來的仿冒客，雙胞胎必須到下水道去，但他們卻發現那裡的所有一切都超乎想像……

一本神秘的日記、一間秘密實驗室以及惡棍的藏匿處，在納瓷林鎮的地底下，不是只有下水道而已！