The film follows the adventures and coming-of-age journey of Chickenhare, a one-of-a-kind hero born half chicken and half hare, who is eager to fit in and to become an adventurer in spite of his differences. Two decades ago, adventuring hare brothers Peter and Lapin are on a quest to find the mystical Hamster of Darkness, to no avail. However, they find something else in their journey, a baby who is both part chicken and part hare. Peter adopts and raises him as his son, naming him Chickenhare. As he grows up, Chickenhare is enamored with adventuring and plans to follow in his father’s footsteps.
In the present day, an adult Chickenhare attempts to pass the Royal Adventure Society trials to become an adventurer, but his disguise used to cover his chicken features weighs him down, causing him to fail the test.