Dewey, a down-on-his-luck musician, poses as a substitute teacher at a prestigious prep school and uniquely inspires his overachieving students to take a risk and create a secret rock band.
When Summer asks Tomika for help to become the lead singer, Tomika must choose between helping her friend or going for the role of lead singer herself.
When Tomika tries too hard to be like her favorite artist, she unintentionally hurts her friends; Dewey tries to prove his music credibility by claiming to know a music legend.