Riley, Theo and Alex are at a monster movie when they discover scoring, the music played over movies to make it feel a certain way. Megablast decides to take it to the streets and provide live scoring for people. They can make any activity fun, dramatic or even scary. But it turns out they weren't the only ones who learned something from the movie. The Rachels, AKA the Copycats, have taken the form of the movie monsters in order to scare everyone out of Greenville.