After a fun summer at camp, Humphrey can't wait to get back to Room 26 and see all of his classmates. But something fur-raising happens on the first day of school---some kids he's never seen before come into Mrs. Brisbane's room. While Humphrey gets to know the new students, he wonders about his old friends, where could they be? It's a big mystery for a small hamster to solve, but as always, Humphrey will find a way!
