Sam, the werewolf boy with whom Grace is in love, becomes human. But Grace herself turns into a werewolf and goes into the forest. Cole St. Clair, a rock star and child prodigy with the makings of a genius scientist, is trying to find a way to return her to human form, but he is running out of time. The fact is that in the vicinity of Mercy Falls a girl was found killed by wolves and the residents of the town demand that the authorities exterminate the dangerous wolf pack. Now the only question is who will achieve their goal first - St. Clair or the residents of Mercy Falls.