Howling II: ... Your Sister Is a Werewolf (1985)
When Ben, the brother of one of the werewolf victims from the first movie, is told that the world is actually full of werewolves and they're planning to take control, he is skeptical. After a good deal of convincing from werewolf hunter Stefan, however, he finally agrees to join Stefan's band of lycanthrope hunters in Transylvania on a mission to kill Stirba, Queen of the Werewolves. Can the group survive against her army of evil?