"Planet of Earthquake" is a manga series set in a dystopian future where Earth has been ravaged by catastrophic seismic events, rendering much of the planet uninhabitable. The story centers on a group of survivors navigating the harsh, unstable environment while uncovering the truth behind the global disasters. The protagonist, a young geologist named Kaito, possesses a unique ability to sense seismic activity before it occurs, a skill that becomes crucial for the group's survival. Alongside Kaito is a diverse cast of characters, including a resourceful engineer named Aya, a former soldier named Haruto, and a mysterious girl named Sora, who harbors secrets about the origins of the earthquakes.

The narrative unfolds as the group travels across the fractured landscape, encountering hostile factions, mutated creatures, and remnants of advanced technology from a pre-disaster civilization. Kaito's abilities draw the attention of a powerful organization known as the Quake Syndicate, which seeks to control seismic activity for its own gain. As the group delves deeper into the Syndicate's operations, they discover that the earthquakes are not entirely natural but are instead linked to experimental geoengineering projects gone awry. The Syndicate's leader, a enigmatic figure named Dr. Kuroda, reveals a plan to manipulate the planet's tectonic plates to reshape the world according to his vision, regardless of the human cost.

Themes of survival, environmental collapse, and the ethical implications of scientific advancement are woven throughout the story. Kaito and his companions must confront their own moral dilemmas as they struggle to prevent Dr. Kuroda's plan from coming to fruition. The series explores the resilience of humanity in the face of overwhelming adversity, as well as the consequences of tampering with natural forces beyond human control. The plot builds toward a climactic confrontation between the survivors and the Syndicate, with the fate of the planet hanging in the balance.