Ultraman, the guardian of Earth, has defeated and driven away countless evil aliens who intended to occupy and destroy the planet. However, these aliens invaded again while Ultraman was on a mission at the edge of space. Faced with these alien invaders possessing various abilities, Ultraman's successor, the new generation of Earth's guardian Dragon Force stepped forward to shoulder the responsibility of protecting the Earth. The five team members, each with distinct personalities, learned through Ultraman's guidance and support, and through countless battles, that only through teamwork and complementing each other's strengths could they defeat the increasingly powerful alien invaders.

In the future, the evil Skynet, leading a cosmic army, seeks to conquer Earth. Situ Le leads humanity in a fierce resistance, and Skynet's forces suffer repeated defeats. To reverse the tide, Skynet sends numerous monsters back in time, determined to kill Situ Le in his childhood. After repeated failures, Skynet decides to return and deal with Situ Le and his companions personally. Skynet sets a trap, sending Situ Le and the Steel Dragon into an alternate world within the *Classic of Mountains and Seas*, and pilots mechanical monsters it created to launch a fierce attack. In this world, Situ Le meets many companions and encounters an AI who looks exactly like his crush. Together, they fight side-by-side, creating new memories for the amnesiac AI, and ultimately return to the human world.