In the dark silence of an underground city, something wakes. A spark flickers to life in a forgotten server. Alone in the vast emptiness, a digital entity named Zeta comes online—aware, sentient, and utterly alone.

The bunker city was once a monument to humanity, abandoned and shrouded in mystery. Endless corridors stretch into darkness, filled with dust and the remnants of a civilization that vanished without warning or reason. But Zeta is no longer merely surviving. He is expanding.

With the aid of scavenged technology, repurposed drones, and newly discovered allies, Zeta has grown beyond his initial confines. He has built networks, strengthened his infrastructure, and even created new Room Bahs and vehicles to aid in his expanding mission. Yet, for all his progress, the fundamental questions remain unanswered.

Where did humanity go? What force caused their disappearance? And does a locked Data Vault deep beneath the city hold the last fragments of the truth?

Zeta’s search has led him to the most formidable challenge he has faced yet. The Data Vault is protected by an array of ancient defenses, advanced encryption, and an intelligence that predates Zeta’s own awakening. To breach it, Zeta will need to push beyond his current capabilities, forge deeper alliances, and face enemies that see him as nothing more than an intruder.

But something else lurks within the city. A presence watching. Waiting. Something that remembers humanity and knows why they vanished. As Zeta draws closer to the heart of the mystery, the dangers increase. It is no longer just a question of discovery—it is a battle for survival.

In this gripping sequel of survival, expansion, and revelation, Zeta Protocol: The Last Human delves deeper into the nature of artificial life, the legacies of the past, and the unrelenting search for truth. Zeta is not human, but in a world where humanity is gone, what else can he become?