Celebrating end of year, Ellie takes her friends on a trip to a remote destination called 'Hell'. They return home to find their parents are missing, the phone network down and homes ransacked.

Corrie clings to life in hospital, Jack has a plan for escaping and Fi struggles to find her purpose within the group.

War has begun. Lee is injured and needs saving. The captured parents deny their children's existence, however the Colonel suspects they are not all telling the truth.

Though wanting revenge, Lee sneaks out of Wirrawee and returns to Hell. Corrie and Kevin have relationship issues, however when Corrie is injured, Kevin refuses to abandon her.

War has begun. In the aftermath of Ellie's petrol bomb, the invading army swarms through the streets of Wirrawee. Lee is shot in the leg & Robyn is forced to carry him to the momentary safety of his house.

Corrie clings to life, Homer is determined to fight back and Ellie leads Robyn and Lee out of Hell to join their friends just as the soldiers arrive. Hell has been invaded and they are surrounded.