A disease wipes out all the citizens of a town, except for those age 21 and under.

The remaining citizens collect the dead bodies to be burned and hope the quarantine will be lifted.

The power goes out across Pretty Lake, cutting off all communication.

A teacher fears she may be the virus' next victim; Chuck institutes a harsh and public punishment.

While power has returned, the remaining residents of Pretty Lake are without communications.

Wiley seeks out food for Jason. Adam recruits Chuck to find out what Liam's real motives are. Ronnie brings Eric's body to Renee's compound.

After his failed escape plan, Chuck returns to find that Wiley and Adam have brought in a scientist. Gord and Franny argue over resources. Ronnie helps Renee find her brother. Mark wants to confess to a killing.

Adam confronts Liam. Wiley and Liam must find someone about to turn 22 to see if the cure works. Franny, Harrison and Tracey discover Mark's secret. Ronnie and Renee fight over power.

The government arrives in Pretty Lake with a cure; Adam has information that may save lives.

Quickly running out of food, Adam and Wiley take a risk. Chuck and Harrison form an alliance, Mark makes a mistake he can’t take back, Gord tries to gather resources, and Ronnie meets an intriguing stranger named Renee.

Adam seeks out the truth of the government's plans for Pretty Lake. Wiley faces the aftermath of Renee's shooting and confronts Liam.

Wiley, Chuck and the rest of the kids race for to the extraction point.