Following the devastating battles of the first part, the ancient seal holding back the Netherworld has completely shattered. Tokyo has fallen under the overwhelming invasion of the Ten Braves, an elite demon force led by the new Overlord of Darkness, Ramaga. With humanity pushed to the absolute brink, the young next-generation warriors must rise once more. Led by Gai, the rebellious wielder of the Crimson Blaze Armor and son of Ramaga himself, the new Samurai Troopers take to the frontlines to defend the human world. In this second act, the stakes become deeply personal. The young warriors must not only stop the demonic invasion but also uncover the dark truth behind the tragic fate of their legendary predecessors—including Ryo Sanada, who has vanished into the deep shadows of the Netherworld.