At their first day of high school, twin siblings Lindy and Logan Watson meet the football team's quarterback Seth Wall, to whom Lindy instantly crushes on, while Logan wants to befriend him in order to make his and Garrett's lives during high school much easier. When their parents travel out of town for work, each of the two siblings think of a party that will bond them with Seth, but their parties are arranged on the same night and end up conflicting. Things get worse when they believe that their babysitter has died and they don't have a chance to cancel the party.

A few days before the school's Spring Fling dance, Sherri – claimed to be the nicest girl in the school – along with Lindy become the only two students with perfect attendance records after Greg Johnson gets sick. Sherri threatens Lindy, saying that she will eventually be the only with a perfect attendance record, making her paranoid about Sherri trying to make her sick.