The News Press has the press running without Mr. Kitrich's notice. The Clue Club have a lead on Ms. Twitchell and Dottie has a lead to the Apex Printing Company. While getting abducted in the theatre Larry, D.D. and Pepper find out about a counterfeiting scheme organized by Mr. Whitaker.
The Clue Club investigate a museum robbery in which the jewels are swiped one by one and Uncle Salty is suspected to be the thief. There seems to be a connection with the lighthouse Uncle Salty once worked in. Larry recreates the crime scene to expose the thief as Mr. Gooch and his trained mouse Barrymore.
The Clue Club investigates a mysterious disappearance of Ms. Coldwell caused by someone named Vortex. After much traveling between home and Blizzard Mountain and avoiding mysterious encounters, they conclude Tom Coldwell caused all this in order to scare away the interested buyers of the ski resort.
The Clue Club investigate a stolen million dollar painting in the Castle Museum. When Woofer and Wimper are assigned to guard a Ming vase, they get stolen, but they meet up with the Clue Club soon. Larry reveals the heist was carried out by a pantomimist Mr. Carlottie and the cleaner Mr. Tobais.
The Clue Club investigate the dock area where a sea monster dwells. What spooks them is someone named Doomsday who seems to be observing them. After combing the shorelines the Clue Club and Sheriff Bagley catch the three diamond smugglers who were able to conceal the diamonds in golf balls.
The Clue Club investigate multiple robberies at Mr. Cosgrave's manor, caused by some masked person in the dark. A trail leads to the suspects the butler Mr. Wilkins and the nursery gardener Ms. Carter who smuggled the jewels in Venus Flytraps.
A pilot Corky requests the Clue Club to clear his name of an X7 plane hijack, which carries insurance. After a major check through on Brock's cow pasture, Larry reveals that a fake airport had been temporarily placed here and Eddie himself stole and hid the plane after getting Corky to land.
Mr. Lean asks the Clue Club to check it out a top security safe. The safe gets taken clean away. Mr. Benchley tells Larry that Mr. Lean's house moves around while everyone else is pursued by a Sasquatch. Larry reveals that safe was never stolen, but they were taken to an exact matching house by Mr. Benchley.
The Clue Club visit a science fair. Just then the new solar generator is stolen. With many suspects in mind, Larry, D.D and Pepper check out Reed's Electronics. A final check reveals that a hologram was placed within the exhibit instead of the actual device, all devised by the scientist Mr. Foster.
The Clue Club witness a train with a gold bullion vanish past a mountain. The only clue is iron pyrite pointing to the ghost town Dobson City. In an old mine nearby the Clue Club find the stolen train and its gold which was diverted by an alternate track in the mountain, carried out by the train dispatcher.
At the Fun Mountain amusement park, the Clue Club are presented with a magnificent statue owned by Bobo Cahuna. The statue then vanishes. Finding out that, this statue was made of sugar, the evidence indicates Mr. Crane crafted it and his monkey dissolved it and the real statue remained in the cargo it was shipped in. Before Mr. Crane is carried away, he asks one of his workers to watch his pet monkey while he is away.
At the county fair, Sally takes the Clue Club to see her prize pig Sweet Pea, except he has been taken away. Dottie notifies a suspicious character, Mr. Glut's butler Mr. Cleek. After looking in the Glut residence, the pignapper is revealed to be the ice cream man who had the means to sell the pig to Mr. Glut.
The Clue Club go to the zoo to search for a missing elephant, but also some other animals. D.D.'s idea of disguising as a chimpanzee to stake out the thief doesn't work. At the docks, Chris Carloff and his accomplice Dr. Henkan are proved to be the thieves that smuggled the zoo animals.
At the Rock Festival, the Crown of Dileria gets swiped. While searching, D.D. and Pepper are pursued by a werewolf. Dottie briefs a likely suspect Mr. Grayson. The whole theft was schemed by Madame Hortense who strongly believes the crown is hers by birthright.
On a trip to the circus the Clue Club, see the acrobat Karelli vanish. The case seems complicated since many people have their views against Karelli who was going to leave the circus anyway to work for someone else. The acrobats Tonio and Peter are revealed to be the ones trying so hard to get rid of Karelli to become the best team.
During a filming shoot of a cavepeople and dinosaur-themed movie, the director Mr. Simmons vanishes. D.D. and Pepper are chased by a dinosaur in their search for clues. Brett Winsome reveals the definite way Mr. Simmons disappeared. Mr. Wolf posed as Mr. Simmons and make it seem like the director disappeared.
