A goat and a wolf become best friends on a stormy night, then spend the entire series trying to hide it from their herds. The show understands that the deepest bonds are the ones you have to keep secret, the ones that cost you every single day. It's a children's story that never condescends to children, built on the quiet terror of loving something that the world says you shouldn't.

Mei is a spirited young goat, and Gabu is a wolf who is also her brave best friend. Set as an extended epilogue to Kimura Yuuichi's children's book One Stormy Night, the series follows the pair on their journeys and explorations. In each episode the two try to have adventurous fun together while keeping their companionship hidden from their own tribes. By nature Mei should be prey and Gabu her predator, yet they stay devoted friends. This adventure drama centers on the idea that anyone, from anywhere, can build a lasting friendship with a little heart and courage.