Interested: 

Possible plot ~ it starts a month after the "disappearance" For the time being most communications ways are still up and running Internet Mobile phones Shortwave radio etc . Our characters start of by looking on forums and social media for other people see if there is anyone else out there~ Over time they hatch a plan to meet up but before that happens communication is cut then the story progresses on their mission to meet up and build up communication and eventually meet up