Contemporary teenager Dazhuang travels through time to the Long March period, experiencing firsthand the struggles of common people shielding the Red Army and the juvenile hero A Bang sacrificing his life for righteousness, ultimately carrying the heroic story of young A Bang back to reality. It shapes his flesh-and-blood image of a young revolutionary, bridges the distance between teenagers and history through dialogue across past and present, interprets the Long March spirit, and guides contemporary youth to remember revolutionary martyrs and deeply cultivate patriotic sentiments.