There's a 'howl' lot a laughter in store, because everyone's favourite mischief makers are back! Join Alvin, Simon and Theodore in this screamingly funny animated adventure. Alvin's just wild about monsters! After devouring every movie and book on the subject, he considers himself an expert. So when a mysterious new neighbour, Mr. Talbot, moves nearby and strange howling noises come from his yard at night, Alvin is sure he's a werewolf! Of course, everyone else thinks Alvin is watching way too much late night TV. But when Theodore is nipped by a 'dog' and suddenly starts chewing on socks, even the logical Simon agrees that something weird is going on. Can Alvin and Simon save their brother before the next full moon, or will Theodore become a fully-fledged werewolf forever!?!! Add a wacky school production of 'Dr. Jekyll and Mr. Hyde', the delightful antics of the Chipettes, and lots of great music to this mix, and you've got a monstrously entertaining adventure the whole family can really sink their teeth into!