With the dreaded new school year right around the corner, the teachers get a surprise when Rod returns to Smoot a sober man. But his new insufferable attitude forces the gang to do the unthinkable to get him back to his old self.

Shoemaker seeks emergency medical help from Abbey; Fairbell takes on a role assisting Cattie, Smoot's new principal; and Loren is left alone in the dust.

Cattie hires a former Denver Bronco to be Smoot's new head football coach, and he appoints Loren as his assistant. But the new coach's methods don't sit well with Tammy and Shoemaker, who go to great lengths to fire him.

Obsessed with the underground rap scene, Loren recruits Shoemaker and Fairbell to join his crew. Meanwhile, Abbey gets caught up in the local gang life, and Shoemaker and Rod butt heads over his relationship with Rod's mother.

After Abbey accidentally discovers Smoot's racist past, Cattie brings Native American students in to make up for the bad publicity. Plus, Rod and Loren start a craft brewery on campus, but find that their success may be short-lived.

Loren finally completes his novel, but the book's success goes to his head, forcing Shoemaker to become his 'agent.' However, when the novel sparks a hookup outbreak, Fairbell and Summer's abstinence class takes a dramatic turn.

After being appointed interim wrestling coach, Fairbell starts a beef with the rival school's coach, who Abbey has a crush on. Plus, Shoemaker takes testosterone, and Loren deals with a new girlfriend - and her two children.

When graffitied pentagrams start popping up around school, Quinn arms the staff with GoPro cameras to catch the vandal - leading to a night of chaos.

Smoot is used as a polling station for the Denver mayoral election, and Quinn assigns the staff to count votes. But the series finale of a major television show occupies the teachers' time and attention.

When a former Smoot senior returns to school, Loren, Shoemaker and Fairbell get paranoid about being the victims of yet another senior prank. Meanwhile, Abbey begins to date a younger guy despite warnings from Tammy and Julie.

It's graduation week at Smoot, and Shoemaker begins aggressively selling Class of 2017 memorabilia to earn some extra cash. Plus, Quinn's effort to set Loren up with a woman backfires, and Fairbell's future at Smoot is in jeopardy.