Xiaotian, Xiaofei and Xiaogang were originally just three ordinary young people in "Hope City" with completely different personalities, ideals and family backgrounds. Because of their special talents, they lived under the same roof by chance, met the secret cultivator Yingying who also had mysterious abilities, signed an armor contract, and gained the ability to summon high-energy combat armor that originated from the planet Ares and combined with the highest technological crystals in the universe. They became the new generation of armor warriors representing the power of justice - Xingtianxia, Feiyingxia and King Kongxia, and fought resolutely against the Netherworld Army headed by Emperor Lufa and his minions. Emperor Lufa and his Netherworld Army came to Earth a thousand years ago to snatch the core "energy crystal" of the earth. After a series of bloody battles, they were sealed in the Demon Suppression Tower by the first generation of armor warriors who also came from the planet Ares. A thousand years later, the battle between good and evil to prevent Emperor Lufa from resurrecting again kicked off, and Xingtianxia, Feiyingxia and King Kongxia became the main forces in the battle.