Sam just got a hamster for a pet. But the hamster is kind of boring ... he just eats and sleeps and gets his shavings wet. Inspired by her book of mythological creatures, Sam longs for a more exciting pet. But she soon realizes that taking care of these magical beasts might not be as wonderful as she thought. Sasquatches are messy, unicorns are shy, gryphons scare the dogs at the dogpark, and having a fire extinguisher handy at all times makes dragons seem like an awful lot of work. In the end, Sam realizes that her hamster is a pretty sweet and safe pet ... or is he?