Everyone thinks Mr. Whiskers is just a sweet, fluffy class pet, not capable of the biggest disaster of the school year. They are wrong. James knows his classroom hamster is still obsessed with nachos, way too fast, and very sneaky. When a nacho truck arrives for the biggest school party of the year, James knows disaster is coming. Then the cheese explodes. Everyone blames James. No one believes the hamster did it. But James has proof. Now he must prove the truth before Mr. Whiskers pulls off another cheesy disaster.