It's the end of the world and I'm in my bathing suit

"When twelve-year-old Eddie Gordon Holloway and his friends are left home from Beach Bash, aka the greatest party of the year, only to realize that everyone in town has disappeared without a trace, they do what any smart, responsible kids would do ... have the best day ever! No parental supervision sounds fun for a while, but forever is a long time. And soon the gang starts to notice strange things happening around town, and they're only getting stranger....