Campbell plots a coup with Lexie and the Guard. Kelly spots something suspicious in a photo. Becca goes into labor. The expedition returns with news.

Will tells Allie he has feelings for her. Elle confides in Helena. Campbell pressures Harry to run for mayor. Grizz leads an expedition.

A Thanksgiving feast takes a frightening turn. In the aftermath, the Guard oversteps its powers. Meanwhile, Sam is torn between Becca and Grizz.

Six months later, Harry sinks deeper into depression, Grizz and Sam bond, Gordie arrives at a theory about West Ham, and Elle puts a plan into action.

Allie questions Elle about Campbell. As the town grows restless awaiting Allie's decision, Will and Grizz push for harsh measures.

A student's confession leads to an arrest and a trial. Elle experiences Campbell's dark side, and Harry's drug use escalates.

A shocking event puts everyone on edge. As chaos sets in, Allie's friends urge her to step up and lead. Gordie conducts an investigation.

After the boys ransack the stores, Cassandra rallies the girls to exert their power. The students plan a prom, and Kelly uncovers a family secret.

Cassandra and her friends prepare for an uncertain future, while Harry's crew just wants to party. Sam and Becca make a discovery.

After their class trip is cut short, students at West Ham High School return home to discover their town completely empty.