A secret mission to find a legendary chicken goes wrong.
Sims' new invention accidentally makes King Voracious huge and Ransome tiny, until they end up in outer space. After an escalating growth battle between Sims, Jeffries and Voracious and Ransome coming face-to-face with a ant, a spider, two germs and some atoms, they grow the earth to fit their scale.
Hunter Hawk is about to have the Foxbusters grounded, but they thwart his attempt. Ransome seems to have taking a liking to Hunter until she realised he's been used by the foxes. They then have to rescue Hunter's wife and child from the foxes.
Sims and Jeffries are confused when Ransome starts acting strangely, and discover that the reason behind her behavior is that she has been hypnotized.
Todd gets taken by accident into the farm. He has no luck escaping and ends up being staying there mistaken for a chicken.
The Foxbusters get all foxes and vixens to fall in love to create a ceasefire, but it only improves their efforts against the chickens. The Foxbusters get the couples to break up.
A zoologist is astounded by the flying Foxbuster hens. The Foxbusters try to avoid a flying pose for the zoologist's camera until they give him "Flying Foxes" to film.
Jeffries is starting to feel overlooked. She goes on a freelance mission to rescue field mice from an owl. After she rescues them, they all rescue Sims and Ransome from the foxes.
Carlotta is through with Rotter and moves in with the Foxbusters. Rotter uses this as an opportunity to grab some eggs. Then Carlotta double crosses everybody.
Ransome has been taken away to an automatic farm, which acts like a prison. While there she befriends a chicken named Five. All Ransome's attempts to escape fail until she makes the systems go haywire.
King Voracious has had enough of chicken fighting and declares peace with the Foxbusters, but both Sims and Volpone break it all up.
The foxes hatch another scheme to catch the Foxbusters, while old Volpone is left with the unpopular task of babysitting Ghengis. Insisting that 'the old ways are best', Volpone sets off with Ghengis to prove it.
Sims tells an ugly duckling story of how she and her sisters were raised by traditionalist parents and became a disgrace to the farmyard due to their flying talent, but gained their placed after rescuing the hens from the fox pack and gained the title as Foxbusters.