In the near future, the Earth's environment is gradually deteriorating. Mysterious alien colonizers through the wormhole "gap" at the bottom of the ocean will be huge, cold, swift and poisonous monsters sent to Earth one after another, methodically implementing their colonial destruction plan. To this end, mankind joined forces to create the "Thief Gull Project", creating a comparable size with the monster mech warriors to meet the war, but with the gradual evolution of the monster, mech warriors were defeated, the dignitaries of various countries attempted to build a biased defense of the "Wall of Life" to block the invaders, but soon met with setbacks. But their attempts to build a defense-oriented "Wall of Life" to stop the invaders were quickly thwarted. At this critical juncture, General Steckle Pentecost (Idris Elba), who is still secretly working on Project Thief Gull, recovers the Danger Rangers pilot (Charlie Hunnam), who suffered a major blow five years ago, and sends him to the United States for help. Charlie Hunnam), who suffered a major blow five years ago, and chooses a new partner, Asako Mori (Rinko Kikuchi), through a rigorous selection process. The resurrected Wanderer, along with the three remaining mechs, will soon face off against the more powerful monster invaders while searching for a chance to wipe out the enemy once and for all.
　　On the vast ocean, battles for the defense of mankind start one after another. ......