The kids post-Battle of the Bands plans are jeopardised when their regular teacher returns, so they have to find a way to get Dewey back to keep their rock and roll dreams alive.

Summer's attempt to share a locker with Freddy sets off a chain reaction of locker-switching that puts the whole band out of sync.

Lawrence tries to prove his value to the group by taking over the production of their first recording, but his methods create a rift in the band.

The band is booked to perform in disguise at the school dance so they can keep their identities a secret; Summer decides to reveal her feelings to Freddy.

In order to improve her singing, Summer gets hypnotized and plans to duet with Tomika for a TV singing competition. However, Summer's new singing skills sparks a rivalry and both girls try out in the competition against each other.

When Principal Mullins goes home sick, Mr. Finn's class decides to celebrate Halloween in school.

When the cafeteria shuts down, Zack starts a food truck, only to find himself in competition with Justin's truck.

Freddy is forced to join the school's a Capella group, jeopardizing the band's chance to record their song for an influential producer.

Summer's jealousy of Freddy's new girlfriend gets the best of her when she befriends the girl and tries to sabotage their relationship.

Summer tries to get over Freddy, but winds up stuck with him and Kale at school overnight; Mr. Finn helps Tomika overcome one of her biggest fears.

Zach has classmates invest in Lawrence's future for a school business assignment; Summer and Tomika help Dewey study to earn his teaching credentials.

Tomika and Zack work on a love song together, leading to a moment that will change their friendship forever; Summer and Lawrence spend time together; Freddy helps Mr. Finn with a problem.

The band must decide if they want to stay together after they fail to impress a music producer at the Austin Music Festival.