The fallout from the nuclear blast in Denver will hit Jericho in an hour and Jake has to get the residents inside. The official shelter is not adequate and Jake must find another shelter to protect them. Emily faces troubles of her own while being picked up by who she thinks are two officers.

Supplies are dropped by air into Jericho and the Green's and Hawkins think that they know where they came from. Jonah Prowse returns to Jericho causing even more trouble.

The lives of Jake and Hawkins are explored during this flashback episode. This episode begins 36 hours before the bombs went off. Sarah is introduced and is associated to Hawkins. Jake had been living in San Diego.