"Humans are no strangers to war."

These words summarize the people of Sera perfectly. Especially for Sergeant Johnny Rico and his Squad, Alpha Squad, the last of the Onyx Guard. They have fought in Pendulum Wars, Locust War, and Lambent war. Rico and his Squad were fighting in Anvil Gate, taking their last stand against the Locust and Lambent horde when suddenly Adam Fenix's weapon was activated. Killing the Locust and the Lambent, but unfortunately, Rico and his Squad perished moments before the war finally ended. But someone was watching over these gears and twisted fate. Johnny and his Squad are then revived and transported to a world called Equis, during a time of war. Now Johnny and his Squad are thrusted into another war, but will they live long enough to see the end of this war?