"New Getter Robo" is a 2004 anime series that serves as a reimagining of the classic "Getter Robo" franchise, blending elements of science fiction, mecha action, and supernatural themes. The story is set in a world where humanity faces existential threats from both alien invaders and ancient, malevolent forces. The narrative revolves around the Getter Robo, a powerful combining mecha powered by Getter Rays, a mysterious energy source with immense destructive and transformative potential.

The series begins with the discovery of Getter Rays by Dr. Saotome, a brilliant but morally ambiguous scientist. Recognizing the energy's potential, he develops the Getter Robo to combat the Oni, ancient demonic entities that have reawakened to threaten humanity. The Getter Robo is piloted by a trio of protagonists: Ryoma Nagare, a hot-headed and skilled martial artist; Hayato Jin, a brooding and pragmatic fighter; and Musashi Tomoe, a gentle and spiritual warrior. Each pilot embodies a distinct personality and fighting style, reflecting the dynamic nature of the Getter Robo itself, which transforms into three different configurations depending on the situation.

As the story progresses, the pilots face escalating threats, including the Oni and the Dinosaur Empire, a faction of reptilian aliens seeking to conquer Earth. The series explores the psychological and physical toll of piloting the Getter Robo, as the Getter Rays begin to mutate the pilots, enhancing their abilities but also risking their humanity. This internal struggle is paralleled by external conflicts, as the team battles increasingly powerful enemies and uncovers the true nature of the Getter Rays, which are revealed to be a primordial force tied to the evolution of life itself.

The narrative is marked by its fast-paced action, philosophical undertones, and exploration of themes such as evolution, sacrifice, and the duality of creation and destruction. The series culminates in a climactic battle against the Oni Emperor, who seeks to harness the Getter Rays to reshape the universe. The final episodes delve into the pilots' ultimate fates, as they confront the consequences of their actions and the transformative power of the Getter Rays.

"New Getter Robo" is notable for its darker tone compared to earlier iterations of the franchise, emphasizing the psychological and existential challenges faced by its characters. The series maintains a strong focus on its central trio, whose interactions and growth drive the narrative forward. With its blend of intense mecha battles, mythological elements, and philosophical depth, "New Getter Robo" offers a compelling and action-packed reimagining of the classic "Getter Robo" saga.