Finding a missing cat seems like a simple,enough case for the Mystery, Inc, gang -- vntil the search leads them into an abandoned puppet factory. There's something a little creepy about these mechanical moppets ...for starters, they talk and walk all by themselves! Scooby and Shaggy are no dummies - when a giant dragon pvppet attacks,they know it's time to split! But can the gang close the case before the puppets close in on them?