Martin Johnson, an ultra-runner, embarks on a grueling 184-mile journey along the Thames Path National Trail, aiming to set a new fastest known time. As he navigates the physical and mental challenges of this immense distance, he reflects on his identity, his family, and the complex history of the Black British experience. Through his run, he seeks to inspire a more inclusive and diverse community in the world of trail running, while honoring the legacy of those who came before him.