Three thousand meters deep underground, the Tower of Light is the only source of light. Ten years ago, Ultraman Sezo, as the captain of the defense team, guarded this world that never saw the light of day with his best friend Helaw. However, overnight, a conspiracy came to light - Herao was framed as a traitor, Thezo was manipulated by dark forces to take away the light of the Tower of Light, the underground world fell into eternal darkness, and both of them wandered to the human world.
In the human world, Serzo changed his name to Situ Shun and worked in a pizza shop. He tasted food for the first time, saw the moment when a butterfly emerged from its cocoon, and felt the warmth of "home" for the first time; while Herao was lured into the abyss step by step by the malice of Emperor Carafar, mistakenly believing that Serzo had betrayed him, and gradually lost himself in revenge and killing. At the same time, Thurzo's lover, Catherine Ultraman, was cursed and her life was hanging by a thread, forcing Thurzo to sacrifice his hometown for a chance of survival.
When a thousand monsters threaten the land and the Emperor is about to be resurrected, two close friends torn apart by fate will finally meet again - one guarding the last goodwill in the darkness, and the other flying into space with the mission of sealing the Emperor. This is an epic about light and darkness, trust and betrayal, sacrifice and redemption. It is also an ascension journey from the earth to the kingdom of heaven, from despair to hope.
