At Porter's Cafe, the Porters are getting ready for an upcoming pie swap meet. At the Lookout, the pups are doing the same thing, but Marshall ends up nearly costing them their pie when he trips.
Elsewhere in Adventure Bay, a bear is awoken by the smell of the pies and goes off to investigate. Meanwhile, in Foggy Bottom, Mayor Humdinger is trying to make a pie of his own for the swap meet, but the Catastrophe Crew keeps messing it up, so he travels to Porter's Cafe to collect fruit for it, and seizes the chance to have Cat Rocky steal Mr. Porter's pies while he is distracted, but the bear soon arrives to get at it as well, taking Cat Rocky with him. Humdinger pleads for Mr. Porter to call the pups, but only when convinced the bear might disrupt the pie swap does he go ahead and call Ryder.
Ryder gets Mr. Porter and Humdinger's request for assistance, and summons the pups. After Marshall crashes into the elevator with a pie and makes an "I Spy" joke about it, much to the amusement of the other pups, they head topside for briefing. Ryder assigns Chase, Rubble, and Rocky to help, and the deploy to go assist.
They arrive at the pie swap, and Chase advises everyone to remain calm, but Humdinger startles her because of Cat Rocky still being in the basket, causing pies to fly everywhere, even one landing on Farmer Al's pickup, surprising him and Farmer Yumi. However, once the bear finally leaves, the pups and Ryder go to help clean up the swap, while Humdinger, still trying to avoid trouble with revealing Cat Rocky is in the basket, decides to go after it alone.
When he does catch up to the bear, he does save Cat Rocky, but the bear turns its attention to him with its cub, while Cat Rocky returns to tell Ryder of the situation. Ryder takes Rocky and Cat Rocky to go save Humdinger, and with the help of Skye, they save Humdinger, while a spare pie that Mayor Goodway gave Rocky is able to lure the bears back to their cave.
Back at the meet, Humdinger arrives with the entire Catastrophe Crew, still upset at not getting any pie, but when Cat Skye tries for the tray that several are on that Mr. Porter is holding, the pies go flying, but while the pups and Ryder save most of them, the last one lands on Humdinger. As he tries it, Mr. Porter jokes about it, leaving everyone with a good laugh except for Humdinger, who just grumbles about it.