Phineas and Ferb are headed to their grandparents' lake cabin for a weekend of outdoor adventure with their friends! They play games, toast marshmallows, and share spooky stories around the campfire. But could there be a real-life Bigfoot watching them from the shadows? The fun continues when Grandpa tells everyone the tale of Badbeard the Pirateand Phineas and Ferb lead the hunt for Badbeards long-lost treasure!.

Based on the series created by Dan Povenmire & Jeff "Swampy" Marsh. "From the hit Disney TV series."