A messenger of the Heavens has arrived in Zhao Ge, which has been ruled by the Shang dynasty for generations. The current emperor, Zi Zhou, refuses to bow his head before the gods, and declares to the messenger that he will no longer accept the tyranny of the Heavens. The gods do not take this kindly; and soon, the emperor of a neighboring land, Wu Jifa, leads a crusade against the rebelling Shang. During the battle, the Shang forces are vastly overwhelmed, and just when the capital is inches away from being taken, Zhou joins the fight. Although he breaks through the enemy ranks and makes his way toward Jifa, out of nowhere a god falls from the sky, landing right before him, prepared to personally deal with the troublemaker.

When a gate to another world suddenly opens on Earth, Mikado City is invaded by strange creatures known as Neighbors, malicious beings impervious to traditional weaponry. In response to their arrival, an organization called the Border Defense Agency has been established to combat the Neighbor menace through special weapons called Triggers. Even though several years have passed after the gate first opened, Neighbors are still a threat and members of Border remain on guard to ensure the safety of the planet. Despite this delicate situation, members-in-training, such as Osamu Mikumo, are not permitted to use their Triggers outside of headquarters. But when the mysterious new student in his class is dragged into a forbidden area by bullies, they are attacked by Neighbors, and Osamu has no choice but to do what he believes is right. Much to his surprise, however, the transfer student Yuuma Kuga makes short work of the aliens, revealing that he is a humanoid Neighbor in disguise.

Second season of Wu Dong Qian Kun.

Second part of Wu Geng Ji 4th season.