Surly and his friends, Buddy, Andie, and Precious, discover that the mayor of Oakton City is cracking one big hustle to build a giant amusement park, which in turn will bulldoze their home. The animals must stop the mayor, his daughter, and a mad animal control officer in order to take back the city park.

Happily-married couple Dan and Jody begin to notice some bizarre activity once they bring their lost nieces and nephew home. But when the chaos expands into Jody's job as a ballet dancer and Dan's career as an Ape researcher, they realize their family is being stalked by a nefarious demon. Together, with the advice of a psychic and the aid of numerous surveillance cameras, they must figure out how to get rid of it before it's too late.

Jellystone Park is celebrating its 100th anniversary, however it may be for the last time, because attendance is down and Mayor Brown wants to close the park and sell the land. If the park is closed, Yogi Bear and Boo Boo will lose their home. They join forces with Ranger Smith to save Jellystone from closing forever. Yogi must really prove in this endeavor that he is "smarter than the average bear".