Doug Funnie (Tom McHugh (actor)) and Skeeter Valentine (Fred Newman (sound effects)) discover a monster (Frank Welker) that lives in Lucky Duck Lake. Believing the monster is evil, they are scared of him at first, but later on, they find him to be nice. Despite this, however, the monster is proof that their friend Beebe Bluff's wealthy father, Bill Bluff (Doug Preis), owner of Bluffco Industries, is polluting the lake, which was what created this monster. The monster almost eats the book ''Moby Dick'', but Skeeter stops him and says, "Stop! You almost ate Herman Melville! You don't eat books, that is a NO!" and the monster returns it to them as an apology, so they name him Herman Melville after the author of the book, and the monster takes a liking to the name. Mayor Tippy Dink (Doris Belack) advises Doug to keep this a secret or Mr. Bluff will kill Herman. Unfortunately, all of this commotion with the monster makes Doug forget that he was supposed to meet Patti (Constance Shulman) at Mr. Swirly's (Bruce Bayley Johnson), the owner of the local ice cream factory. When he remembers this at the last minute, he runs to Swirly's as fast as he can using the quickest shortcuts that he knows. Once he gets there, Patti is nowhere to be seen. He asks Mr. Swirly if he's seen her, and he says that she was here for a while and looked very upset, and then left with a guy who kept talking about his big plans for a dance. When Doug heard this, he knew that this guy was no one else but Guy Graham (Guy Hadley), a snobby upper class man who wants Patti. Meanwhile, Roger (Chris Phillips (voice actor)) and the AV nerds are building a robot (Eddie Korbich) to kidnap Herman, but when they build the robot it acts like a babysitter to Roger, much to the latter's dismay and annoyance.