After a big fight with his wife, Rupert's grandfather, known to everyone as Gump, packs up and moves into Gentle Breezes Nudist Community for Active Seniors.
Thirteen-year-old Rupert is sent in to talk some sense into him. While he's there, Rupert accidentally lets Gump's dog, Wayne, escape. Gump is frantic. Wayne is blind and tends to panic. Rupert and his grandfather set out to search the woods, and soon they are lost too. Aside from an apron, Gump is butt naked, and without his phone, Rupert feels naked too.
The only way they are going to get out of this mess is by working together.