Bixby Alexander Tam (nicknamed Bat) has been the caretaker for Thor, the best skunk kit in the world, but the last day of third grade is quickly approaching, and Thor is almost ready to be released into the wild. The end of school also means that Bat has to say good-bye to his favorite teacher, and his best friend is leaving for a long vacation. Bat can't help but feel that everything is coming to an end.