Night of the Zoopocalypse
Plot
In the massive zoo/amusement park Colepepper Zoo, a meteorite crashes into a satellite as a charged up piece of it crashes into the zoo through the new animal's enclosure and into the "Kuddle Korner" petting zoo, where a curious bunny eats it and gets infected with an alien virus, incubating it in a purple pod and turned into a "Gum-beast"; a grotesque, indestructible gummi-like mutant zombie able to survive even when dismembered. It then proceeds to infect the other animals by biting them as they leave the barn to infect almost every animal in the zoo aside from Gracie, a young timber wolf and Dan, a mountain lion, alongside four other animals; Xavier, a red ruffed lemur who constantly injures himself and fakes illness to be taken to the veterinary office to watch late night movies, Felix, a pompous, self-sufficient and arrogant proboscis monkey, Frida, a feisty capybara, and Ash, a sarcastic ostrich.
After almost being attacked by an infected gorilla named Fred that Felix left behind to save himself, the team splits up as Felix, Frida, Ash, and Xavier escape out the backroom and eventually make it to the gift shop to barricade themselves in while Gracie makes a deal with Dan to give him the zoo key to let him escape back into the wild if he escorts her to her pack and enclosure. After escaping more of the Gum-beasts, including the original infected rabbit, dubbed Bunny Zero, Gracie and Dan find the only remaining uninfected animal; a young pygmy hippo named Poot in a ball pit that Gracie has her join them by her promise of her and Dan eating Poot if they get hungry. However, upon making it to the wolf enclosure, Gracie is horrified to see her entire pack have been turned into Gum-beasts.
A despondent Gracie argues with Dan before the others accidentally power on the attractions from the gift shop and the duo are attacked by a horde of gum-beasts. As Gracie and Dan end up decapitating the infected Fred in the cable car, Felix abandons the others to get the key in order to escape, leaving the door open to inadvertently allow an infected kangaroo and her joey inside to attack them as Gracie, Dan, and Poot come face to face with Fred, who has been amalgamated with a giraffe into a twisted monster that has the key attached to its leg. During the fight, Dan is infected and attacks Gracie before they fall into the security office. There, in the ensuring chaos, Dan falls into a sink overflowing with soap and water and, to Gracie's surprise, appears to be cured by the soap. Wanting to save the zoo, Gracie and Dan butt heads again as Dan leaves with the key after being called a coward.
At the gift shop, Gracie and Poot rally Ash, Frida, and Xavier (who all survived the kangaroo attack) to cure the Gum-beasts while Felix steals the key from Dan, only to be swarmed by infected tree frogs and rescued by Dan (though, he only did so to get the key back). Felix tries to talk Dan into tagging along to the wild, causing Dan to have a change of heart and leave Felix with the key to save his friends, the latter attempting escape and just about able to, only to be swarmed and infected by the tree frogs. Gracie and the others manage to lure Bunny Zero and the Gum-beasts to an enclosure, using an infected elephant to topple a water tower and with Dan's help, fill the enclosure's moat to cure them all. However, it's revealed that all the Gum-beasts have instead combined into a large amalgamated monster, with Bunny Zero in control, and absorbs and infects the others.
With Dan and Gracie being the only ones left, the monster tries to escape the zoo and wreak havoc on the world before the infected Poot, having fallen off, activates a snow globe in the destroyed giftshop and turns back to normal. Gracie remembers the radio was on during the earlier confrontation and realizes that music is the cure for the virus and not soap and water as she thought before. Before they could act, Dan gets absorbed by the amalgam, leaving Gracie to force the clock tower in the middle of the zoo to 7 o'clock and initiate the song while Poot distracts the monster. Gracie succeeds just before she's attacked by the infected Felix and the released animals join in by singing as every animal, including Bunny Zero, are turned back to normal.
With reunions occurring and new friendships forged, Dan leaves the zoo and returns to the wild, but leaves the key for Gracie in case she decides to join him as she soon goes back to her pack and her new friends.