The curtain rises on Rocky (Zachary Levi), who finds himself in a whimsical daze as he shares tales of his past adventures with an audience made up of his very own egg, which has magically sprouted legs and is now merrily dancing around him. Both Ginger (Thandiwe Newton) and Rocky are entranced by the egg's playful antics, which triggers memories of their perilous escape from the devious Mrs. Tweedy (Miranda Richardson). Their story takes them to a serene chicken sanctuary, where they've nurtured close friendships with hens like Babs (Jane Horrocks), Bunty (Imelda Staunton), Fowler (David Bradley), and Mac (Lynn Ferguson). Just as Rocky's tale reaches its most heartwarming point, the egg surprises everyone with the joyful arrival of their daughter, Molly (Bella Ramsey).
As time flies, Molly grows into an indispensable part of their flock, her gaze often drifting beyond their isolated island. She becomes fascinated by the activities of Nick and Fetcher (Romesh Ranganathan and Daniel Mays), who bring treasures from across the lake. However, her adventurous spirit clashes with her parents' desire for safety, leaving them to contend with her mercurial curiosity. Ultimately, Molly's yearning for adventure leads her to sneak out one night, despite Ginger's fears about the dangers lurking beyond their sanctuary.
The search for Molly ignites as Ginger's sharp intuition drives her and Rocky to rally together in their mission to find their daughter. Along with Babs, Bunty, and Fowler, they embark on a suspenseful adventure, only to discover that Molly has formed an unexpected alliance with the free-spirited Frizzle (Josie Sedgwick-Davies). Together, they believe that hitching a ride on the Fun Land Farms truck could pave the way for their escape. Meanwhile, the rest of the hens give chase but soon lose sight of them.
Ginger's focus on rescuing Molly leads her and her companions to the ominous gates of the Fun Land Farms factory. Although Rocky attempts a daring infiltration, the advanced security systems leave him momentarily dazed. With steadfast resolve, Ginger skillfully navigates the facility's obstacles and gains access, beginning to devise a plan for Molly's rescue. The other hens turn to Nick and Fetcher for assistance, who, after Ginger reassures them of Molly's peril, agree to lend a hand. Together, they concoct a clever diversion involving a cake to outsmart the guards at the factory.
Simultaneously, Molly and Frizzle appear to be adapting to their new surroundings, blissfully unaware of the dark undercurrents at play. When Molly notices collars on the other hens, she grows increasingly uneasy, prompting her to plot an escape. That tension escalates as she encounters Dr. Fry (Nick Mohammed), the ominous genius orchestrating the facility's operations. Frizzle, unfortunately, falls under Dr. Fry's influence, and Molly realizes that their time is limited.
In a surprising twist, Dr. Fry introduces Reginald Smith (Peter Serafinowicz), the owner of Sir-Eat-A-Lot restaurants, to a video depicting the "luxurious" lifestyles of the chickens destined for his menus. Molly and Ginger’s clandestine entrance into the room brings them face to face with Mrs. Tweedy, whose nefarious glare sends shivers down Ginger's spine. She cannot believe that her old nemesis has teamed up with Dr. Fry, driven by wealth and a sinister agenda. In a chilling demonstration of mind-control, Mrs. Tweedy programs a hen to march eagerly into a processing machine, emerging as a neatly packaged nugget, consumed with delight by Reginald.
As Mrs. Tweedy's diabolical plans unfold, she soon senses Ginger's presence and morphs from a shrewd businesswoman into a vengeful hunter. Dr. Fry is called to get Ginger ready for processing, but Babs, Mac, and Bunty intervene by hacking into the surveillance feeds. Rocky, Nick, and Fetcher watch in horror as the ghost of their past returns, prompting a swift action to disable the cameras, allowing Molly to rescue her mother from the sinister grips of mind control.
Reunited, the group faces a new crisis, locked within a relentless corn silo as Mrs. Tweedy prepares to activate the grinder to eliminate them all. As Molly grapples with guilt over their predicament, they soon remember Rocky's earlier popcorn demonstration, utilizing fireworks and Mac's reflective glasses to propel themselves to freedom.
With Fowler anxiously watching, the group assembles at the rooftop, ready to descend via zipline. Yet Molly's nobility shines as she prioritizes rescuing Frizzle and the other trapped hens. Ginger quickly steps in, uniting with Molly to confront the looming threat, while the rest of the hens rally in support.
Just as Mr. Reginald's trucks roll in to fulfill Mrs. Tweedy's gruesome orders, the hens' well-planned rescue operation springs into action. Though Mrs. Tweedy attempts to regain control by activating the collars, she finds herself stopped in her tracks. In a heart-stopping moment, Molly faces off with Mrs. Tweedy, who threatens her unless Ginger relinquishes her captured remote. At that critical moment, Rocky intervenes, swinging into perilous action. His swift maneuvering manages to send Mrs. Tweedy tumbling into her own grinder, a fitting end for the once menacing foe.
With their nemesis gone, Ginger swiftly frees the hens and leads the newly rescued flock into safety aboard one of Reginald's trucks. Yet, just when they believe they're safe, a crisp Mrs. Tweedy reemerges, brandishing an axe for revenge. However, Fowler's quick thinking saves the day by sending her tumbling into a moat as embattled machines around them malfunction spectacularly.
In the aftermath of these harrowing events, Ginger and her loyal companions welcome their new feathery friends into their sanctuary, expanding their haven. Together, Molly and Frizzle venture forth, spying on a nearby chicken farm that desperately needs liberation. United, Ginger and her crew embrace another chance at adventure, ever ready to confront new challenges with unwavering bravery and solidarity.
