In the year 2040, Earth is plagued by Eclipse Beasts, monstrous creatures that emerge during solar and lunar eclipses. Humanity survives in fortified cities, protected by Gatekeepers—individuals who harness the power of the Celestial Gates to fight the Beasts. But the Gates are weakening, and hope is fading. Kai Ren, a failed Gatekeeper turned scavenger, stumbles upon a forbidden power when he unlocks the Eclipse Gate, a portal to the chaotic Void Realm. Awakening as a Sovereign, Kai gains access to the Void Eclipse System, a mysterious interface that grants him incredible abilities tied to the Void. However, this power comes at a cost: the more he uses it, the more he risks corruption