After the Pretty Committee wears revealing "Dirty Devil" Halloween costumes to school, Principal Burns has a new dress code: uniforms. With the stress of a new bet between Massie and Claire, plus the upcoming boy-girl Halloween party, Massie and Claire are planning. They decide to put aside their differences and team up to win the uniform contest. In the meantime, Alicia becomes friends with a girl who has been absent for a while, teaming up with her in the contest instead of joining Massie, Kristen, Dylan, and Claire. Alicia and Olivia change the photo for the voting box of the uniform contest and wins the contest. Massie finds out and wants revenge.
