 A massive corporate conglomerate, Octopus Inc., run by a shrewd and cruel tycoon named Rod McCain, purchases a UK-based leisure company, and also the failing London Marwood Zoo. To bring more business to the zoo, Octopus hires a new manager, Rollo Lee, who promptly comes up with a way to increase profits-do away with all the animals except for the ferocious ones. This new Fierce Creatures Policy shocks the Marwood zookeepers, led by the unendingly talkative Adrian "Bugsy" Malone. Eventually, Rod McCain s son Vince, along with the up-and-coming business executive Willa Weston, take control of the zoo and revoke the Fierce Creatures Policy. Vince instead comes up with many under-handed and vicious schemes to attract customers-unauthorized celebrity endorsements, shoddy, overpriced zoo merchandise, and using robotic animals instead of real ones. However, Vince is also stealing from the zoo s funds, and when his father finds out, he rears to turn the zoo into a Japanese-owned golf course. Meanwhile, Willa has grown to love the zoo and its animals, and, along with her newly-reformed love interest Rollo, plot with the zookeepers to save the zoo from the McCains.