Phineas, Ferb and the gang build a giant version of a childhood game, using Danville as the central location. Meanwhile, Candace, torn between busting her brothers and playing the fun game, ends up playing along with them so that she can carry on her title of "Skiddley Whiffers Queen." On the other side of town, Dr. Doofenshmirtz is trying to deal with Vanessa growing up and wanting to be a typical teenager. He drops her off on a camping trip with her friends, but can't cope with leaving her alone, so he disguises himself as a fellow camper, and along with Agent P's help, tries to protect her.