Ethan Morgan is a geeky freshman, not trusted by his parents to stay home alone with his little sister Jane. They hire Erica, a girl from Ethan's high school who is a huge fan of ''Dusk ''(a parody of Twilight (novel series)), as a babysitter. However, Erica comes across her best friend Sarah and Jesse, Sarah's vampire ex-boyfriend, on the night she is to babysit, and decides to attend a party that Jesse is throwing instead. During a fight between Sarah and Jesse, Sarah ends up at Ethan's house and tells Ethan's parents that she was asked to babysit instead. Ethan suddenly has a vision (spirituality) when touching Sarah, and notices she has no reflection in the mirror, leaving him suspicious of her. He confides this in his dorky best friend, Benny (Atticus Mitchell).