Humans call them “Calamities”—mysterious and destructive creatures that suddenly appeared on Earth, bringing chaos and destruction. To fight back, the Zodiac Gods awakened twelve humans known as the Saints, warriors chosen to protect humanity from these terrifying monsters.

However, there was one more who awakened—Lee Geon. Unlike the others, he was not chosen by any god. Despite that, he quickly proved himself to be the most powerful warrior among them all. His overwhelming strength made him a hero to the world, but also a threat to the very allies who once fought beside him.

Betrayed by the twelve saints, Lee Geon was trapped inside the Tower of Demons for twenty long years. Everyone believed the thirteenth saint had perished within the tower. But against all odds, he survived.

After two decades of relentless battles against endless monsters, Lee Geon finally escapes the tower—stronger, more ruthless, and ready for revenge. Now, the man once abandoned by his comrades has returned to settle the score. One by one, the saints who betrayed him will face the consequences of their actions.

Can Lee Geon defeat the powerful saints and claim his revenge, or will the divine warriors prove too strong even for the legendary thirteenth saint?

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