On a cold beach in South Carolina, the soldiers of the 54th Massachussets Regiment are marching into battle. Their mission: to capture the impregnable Fort Wagner. The odds are heavily against them, and the stakes could not be higher - they are one of the first all-Black regiments in the Union Army, and all of America is watching them. The story of an all-Black regiment's assault on the impregnable Fort Wagner in the Civil War, an act of extraordinary courage that changed hearts and minds in America forever.