Needy (Amanda Seyfried) and Jennifer (Megan Fox) are friends despite being as different as chalk and cheese. Needy is an introvert bookworm while Jennifer is an arrogant and conceited cheerleader. Strangely, Jennifer develops an appetite for human blood. Soon, Needy sees her male classmates being killed in appalling attacks. It's up to Needy to get to the bottom of the truth and find a way...

Needy (Amanda Seyfried) and Jennifer (Megan Fox) are friends despite being as different as chalk and cheese. Needy is an introvert bookworm while Jennifer is an arrogant and conceited cheerleader. Strangely, Jennifer develops an appetite for human blood. Soon, Needy sees her male classmates being killed in appalling attacks. It's up to Needy to get to the bottom of the truth and find a way to stop Jennifer from killing more people.