When the PAW Patrol's biggest rival, Mayor Humdinger, becomes Mayor of nearby Adventure City and starts wreaking havoc, Ryder and everyone's favorite heroic pups kick into high gear to face the challenge head-on. While one of the pups must face his past in Adventure City, the team finds help from a new ally, the savvy dachshund Liberty. Together, armed with exciting new gadgets and gear, the PAW Patrol fights to save the citizens of Adventure City and stop Mayor Humdinger from destroying the bustling metropolis.