Riley, Maya, Lucas, Farkle, Zay, and Smackle start their freshmen year and quickly learn their place as smaller fish in a much bigger lake.
Riley, Maya, Lucas, and Farkle head to High School. Riley and Maya are intimidated by the older kids. Meanwhile, Lucas and Zay try out for the football team and gets picked on by the other players. Farkle and Smackle are hanging out with the brainiacs and fit in with them really well.
Riley, Maya, Lucas, Farkle, Zay and Smackle start high school but get bullied by seniors. They are not happy and tell Riley she believes in people too much. Meanwhile Ava is having problems at home with her parents and goes to Auggie, Topanga and Cory for advice.