Can sworn enemies ever become friends?

Eleven-year-old Max can't decide what's more annoying--the fact that his pack of werewolves can't locate the last two evil banshees or being treated like a helpless little kid all the time instead of the fierce fighting werewolf he is.

When Max discovers that the mysterious new girl in his class is a banshee in disguise, he's determined to use his inside knowledge to prove himself to his pack, and maybe end the banshee war forever.

That is until he notices that this banshee girl doesn't seem all that evil after all.

Can he really help his pack destroy her? Can he bring himself to betray his pack?