In an era of global instability, how would people react to a mysterious alien that battles deadly monsters on Earth? Would a suspicious human race be capable of viewing Ultraman as a friend or foe? Ultraman Nexus follows Kazuki Komon, a first responder who joins the Night Raiders, a secret group that fight murderous monsters called Space Beasts.

In the very first episode a strange visitor from space notices Kaito's bravery when the young man risks his own life to help save a lost little boy from danger. The alien gives Kaito the power to become the mighty superhero Ultraman Max, a towering red and silver giant 40 meters tall. When two gigantic monsters threaten the world, Kaito uses his new powers to destroy them.