25 years after the events of Gears of War 3 (2011), a new breed of monsters called "The Swarm" threatens the remaining inhabitants of Sera. Marcus Fenix and a new generation of Gears are the last hope to ensure the survival of their species.
Set years before the events of the previous "Gear of War" trilogy, the story centers on Kilo Squad, a troop of soldiers led by Damon Baird as they attempt to save the besieged city of Halvo Bay from a terrifying new enemy.
Peace is shattered when colony worlds are unexpectedly attacked. And when humanity's greatest hero goes missing, Spartan Jameson Locke is tasked with hunting the Master Chief and solving a mystery that threatens the entire galaxy.