At an ice hotel at night, two workers are pulling a frozen bird and admire all the frozen ice age creatures in the building. They then start making ice jokes with one of the archaeologists joking about a frozen Ice Man. While they are laughing the Iceman's eyes look directly at them. The archaeologists then notice a big vault that contains an old and precious piece of stone jewelry. The Ice Man suddenly starts to break out of the ice and the archaeologists notice the flood is al wet. They then turn to see the Iceman gone then look up to the see the Ice Man himself who attacks them.
It's daytime and the gang arrives at the ice hotel. Daphne is giving the gang a tour of the hotel explaining that every year it gets redesigned. Fred asks why Daphne's family owns the hotel which Daphne explains that they just own stock in it. Velma then arrives in a big winter coat and ice tools in order to face her nemesis water. As they go on Shaggy and Scooby begin to talk about how people get their tongues stuck to frozen polls which they later try to do. Meanwhile, Fred and Velma state that they should visit their rooms and check out the ice exhibit, they then notice Daphne up to something then Shaggy and Scooby cry for help after getting their tongues stuck to one of the ice polls. A woman named Lisa arrives and helps get their tongues unstuck with a blowdryer. Fred asks if Lisa is the bellhop when the hotel co-owner Ms. Anja arrives and explains how a scientist found a frozen Ice Man and that if thawed out and went on a rampage. Fred assures Ms. Anja that they will find the Ice Man until Daphne starts acting strange and escapes on a rope then Scooby and Shaggy get their tongues stuck again.
The gang arrives at their room which is made of ice that Shaggy and Scooby slip-on. Fred states that they should split up and look for clues then wonders where Daphne is. Shaggy states that Daphne is going to find someplace to be warm. Velma looks at the brochure and finds that the only warm place in the hotel is the steam room which Shaggy and Scooby decide to visit. At the steam room, Shaggy and Scooby are eating hotdogs when they see the Ice Man in the room with them. They all run out and go to their locks to get their stuff then continue running. The escape the Ice Man by hiding behind an ice pole which they get their tongues stuck on again. Fred and Velma enter the exhibit where they encounter Daphne dressed like a thief. Shaggy and Scooby then arrive at the exhibit claiming that they found the Iceman. The Ice Man then arrives and attacks the gang.
The Ice Man chases the gang where they become separated due to the ice and the Ice Man chases Shaggy and Scooby. Where they trick the Ice Man by disguises themselves as speech instructors trying to teach him to speak. After many tries, he finally gets it right and Scooby and Shaggy escape. They meet up with Fred and Velma after getting their tongues stuck on the stairs which Lisa helps with again. The gang then notices a showy figure through the ice who is revealed to be Dr. Vantee the anthropologist who found the Iceman. Velma asks him what the Ice Man wants but Dr. Vantee says he doesn't because he found the Ice Man in Europe along with a 10,000-year-old stone necklace and states the Ice Man may want it back. After Dr. Vantee leaves Daphne arrives on a bungee cord and suggests they check out the storage area where the Ice Man first got free.
At the storage area, Velma finds a laser pen that anciently cuts a frozen hunting spear in half. Fred then steps on a device that traps the gang in suspended animation. Daphne arrives a reveals that the device Fred stepped on was one of her diversion devices and the laser pen is hers. Fred then demands to know what Daphne is doing when a bomb goes off opening the vault. The Ice Man then arrives and a musical chase scene occurs which ends with the gang crashing into the vault. Ms. Anja arrives and accuses the gang of stealing the precious item in the vault and sends them to ice jail.
In ice jail, Fred demands Daphne to tell him what is doing on. Daphne reveals that she was breaking into the vault to steal back her pendant. The ice age jewelry Dr. Vantee mentioned found it on an exhibition funded by her great grandmother Mimi Blake who gave it to Daphne for her 10th birthday which she treasured and kept locked in her room for safekeeping. But Daphne's mother lent it to the hotel without her permission assuring Daphne it would be safe. So Daphne tried to steal it back and prove to her mother it wasn't safe there. She never told the gang because she didn't want to drag them into her mess. Daphne apologizes to the gang for her actions and states that she couldn't have known an Iceman would ruin her plan. Fred then realizes it was the other way around which is the answer to the mystery. Fred and Daphne get the gang out of ice jail by tempting Velma into releasing her water fears on the wall. Which creates a long tunnel through the hotel.
The gang goes back to the vault where Daphne picks the safe and gets the necklace. The Ice Man arrives and chases the gang through the hotel. Daphne traps the Iceman by using her laser cutter to cut a chandelier from the ceiling and fall right on him. The Ice Man is arrested and unmasked as Ms. Anja, as it turns out Daphne wasn't the only one trying to steal her pendant. Being an owner of an ice hotel and an expert on all things frozen Ms. Anja was able to fool everyone into believing that the Ice Man broke out of the ice. She used the Ice Man to scare guests away long enough to try and steal Daphne's pendant which she blamed on the Ice Man. Dr. Vantee himself even suggested that the necklace could have been made by the Ice Man 35,000 years ago but not knowing enough about anthropology Ms. Anja made some mistakes which were clues that Ice Man wasn't what he seemed to be. For instance, the Ice Man was curiously unafraid of its natural enemies the sabertooth tigers. The reason why was because Ms. Anja hated co-owning the ice hotel with the Blakes so she was planning on selling the necklace in order to buy up their part of the hotel proving it was never safe here, to begin with, but luckily Daphne was executing a heist of her own. Dr. Vantee then asks where his real Ice Man is, where Fred reveals that it was hidden in not the most subtle of places, behind its presentation curtain where Shaggy and Scooby get their tongues stuck to. Daphne then promises to tell Fred next time she does something which Fred furiously boasts that there is no next time.
- Bryan (single appearance)
- Mary (single appearance)
- Hotel guests (single appearance)(no lines)
- Mimi Blake (only time mentioned)(deceased)
- Police officers (single appearance)(no lines)
- Ice hotel
|Lisa||Always appeared out of nowhere.|
|Ms. Anja||She's spooky.|
|Dr. Vantee||He was the one who found the Ice Man.|
|Ms. Anja as the Ice Man||To steal Daphne's pendant, sell it, and use the money to buy the Blakes' part of the hotel.|
|Frank Welker|| Scooby-Doo|
|Matthew Lillard||Shaggy Rogers|
|Grey Griffin|| Daphne Blake|
|Kate Micucci||Velma Dinkley|
|Erica Lindbeck|| Mary|
|Matthew Mercer|| Bryan|
- The title is a play on "Naughty or nice."
- This aired in a death slot on Boomerang in the US.
- Disguises: Shaggy and Scooby as speech instructors.
- "Zoinks" count:
- "Jeepers" count:
- "Jinkies" count:
- Daphne Du Jour: Secretly trying to break out her own necklace to prove it wasn't safe.
Animation mistakes and/or technical glitches
- None known.
Inconsistencies/continuity errors and/or goofs/oddities
- None known.
Fred: What do you say we check out our rooms?
Fred: Don't worry Miss Anja. The gang and I will get to the bottom of this and stop this iceman.
Fred: Uh, where's Daphne?
Fred: Velma, it really is perfectly safe.
Daphne: Hahaha. Fred, stop being so suspicious and searching for clues about me. Since when have you ever been into mysteries?
Fred: Your 23,000 year old Iceman is...
Miss Anja: I wish there was a Swedish word I could call you more appropriate than "meddling", but there isn't.
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