Holly is a young and curious hedgehog who, after losing her parents, is overprotected by her older brother. Their neighbor Walter is the head of a rabbit family and the father of more than 50 little bunnies. Tired of their quiet, predictable lives, both Holly and Walter dream of adventure. One day, Walter loses his memory, and Holly tells a small lie so they can set off together on an unforgettable journey filled with new friends, unexpected dangers, and exciting adventures.