Chickenhare, alongside his friends Abe and Meg, embarks on an adventurous journey home from a mission at the palace of King Zamban, where they sought the mythical Holy Spork—a remarkable relic that grants the user the ability to consume anything with ease. Upon their return, Chickenhare’s adoptive father, King Peter, identifies a curious marking on the Spork. This revelation propels him to secretly escort the trio to the library for a discussion regarding the enigmatic Groundhog, a creature that possesses the extraordinary ability to traverse time and modify historical events. Utilizing the Spork on a blank parchment uncovers a map to the Isle of Idle Hands, igniting plans for an expedition, although they are oblivious to the two mischievous twin chameleons, Miggie and Rolf, and a chicken archivist named Gina, who overheard their conversation.
In a private moment, Gina confides in Chickenhare, revealing that she is his long-lost sister. She explains the dire situation of their long-lost heritage, claiming that their kin is on the brink of extinction due to the demise of their island’s Tree of Life. Gina hopes to harness the powers of the Groundhog to revive the tree, but King Peter, fearing the consequences, wishes for its destruction. Feeling the weight of responsibility to save his people, Chickenhare makes the bold decision to pilfer the map from Peter, joining forces with Meg, Abe, and Gina to set sail for the Isle of Idle Hands.
Meanwhile, Crolloq, a cunning lynx adventurer with a complicated history involving Meg, learns about the Groundhog's existence from the chameleons and seeks to seize it for her own, hoping to reclaim Meg's partnership. Upon reaching Hilly-City, the group employs Carl, a former cartographer turned tattoo artist, who identifies two crucial discrepancies on the map that indicate treasure locations. When Carl attempts to tattoo Chickenhare as a form of payment, the group wisely flees, soon colliding with Crolloq and a band of pigmies. A daring chase ensues, ultimately leading them to escape on gondolas, though Gina suggests they separate to enhance their search.
Crolloq follows Meg and Abe in her airship, prompting Meg to heroically leap from the gondola to distract Crolloq away from Abe. During this time, Abe finds himself wandering in the jungle, where he forms a bond with Squeak, the smallest of the pigmies. Together, they uncover a part of the treasure—a magical shovel designed to focus the Groundhog's immense power. Meanwhile, Meg finds herself in a tussle with Miggie and Rolf, but ultimately gets overpowered by Crolloq, leading to their both tumbling into a pit. In this dire moment, Meg supports Crolloq through a panic attack, letting her reminisce about their shared past, thus unveiling the depth of their former relationship.
Eventually, Chickenhare stumbles upon the shocking truth that Gina is a hare-chicken hybrid, similar to himself. They learn that their ancestors were once ordinary hares until they were cursed by the tyrannical rat King Bartolomeo for their defiance, forcing them into a life of obscurity. As they explore the Sundial Hills, they arrive at a temple and successfully locate the Groundhog. However, in a shocking turn of events, Gina betrays Chickenhare, confessing her intention to use the Groundhog to revert their transformations back to normal hares. Consumed by anger, Chickenhare disowns Gina before she knocks him unconscious, overpowers Abe and Squeak, seizes the shovel, and sails off.
Regaining consciousness, Chickenhare is reunited with Peter and Meg, who band together to confront the challenge ahead. With Crolloq offering her airship for support, they set out to track Gina down, who has returned to her hare-chicken village, concealed by the ailing tree while preparing for a crucial ritual, though doubts cloud her mind. As dawn breaks, Chickenhare and his companions arrive in a race against time to disrupt the ceremony. During a fateful moment, Chickenhare and Gina both grasp the Groundhog as it activates, transporting them back to their family tree, where their lineage's history unfolds before their eyes, including the sorrowful passing of their mother.
In a twist of fate, it becomes evident that there never was a curse; they were always hare-chickens, merely made outcasts by Bartolomeo's manipulations. Gina, wishing to stop a misguided ancestor from spreading falsehoods about their transformation, enters the past to fortify the hare-chickens' acceptance of their true identity. However, her intervention inadvertently ignites a war, ultimately distorting the timeline and jeopardizing their family tree as the Groundhog strives to flee and leave them trapped in the past.
Harnessing their unique ability to fly, Chickenhare and Gina seek another portal that allows them to undo Gina's earlier choices. With newfound humility, Gina expresses her regret for her actions, and Chickenhare graciously welcomes her back into his life. Upon returning to the present, they reveal the truth to the hare-chickens, urging them to open their hearts and minds to the world beyond. Moved by their resolve, the hare-chickens decide to share their Tree of Life with the outside world once more, fostering an environment of healing and growth. Ultimately, Chickenhare returns home with his friends, while Gina promises future visits, as the villagers embark on a newfound journey of discovery on their own terms.
