Thomas has spent his life surrounded by the people who became his family: friends who stayed, love that shaped him, and a small Scottish town that held them all together. When a loyal dog named Knuckles enters their lives during a season of change, he becomes a quiet companion through a long road toward healing. Years later, an unexpected accident pulls the town together once more, reminding them how deeply their lives are woven. Tender and deeply human, Knuckles is a story about the family we choose and the dog who walks beside us through the moments that define a life.