~When the party is over~

Cheryl is a highschool student who has just moved to California with her mum and her older sister.She doesn't have many friends and can't help but notice that Zack,a popular guy from her school,has been checking her out.She wants to get his attention so when Betty's Party comes she gets dressed to impress him only to find out he wasn't there.Then a loud scream ends the party.What could have possibly happened that night?Well Cheryl is tasked to find it out and expose a huge secret Betty has been keeping for a long time.....