"Chōdenji Robo Combattler V" is a 1976 mecha anime series set in a future where Earth faces an existential threat from the alien Campbellians, a technologically advanced race seeking to conquer the planet. The story centers around the creation of Combattler V, a giant super robot developed by Dr. Nanbara and his team to defend humanity. The robot is piloted by a group of young individuals known as the Battle Team, each specializing in operating one of Combattler V's component vehicles: the Battle Jet, Battle Craft, Battle Tank, Battle Marine, and Battle Crasher. Together, these vehicles combine to form the titular robot.

The Battle Team consists of Hyouma Aoi, the team leader and pilot of the Battle Jet; Juzo Naniwa, the eldest member and pilot of the Battle Craft; Daisaku Nishikawa, the hot-headed pilot of the Battle Tank; Chizuru Nanbara, the team's sole female member and pilot of the Battle Marine; and Kosuke Naniwa, the youngest member and pilot of the Battle Crasher. Each member brings unique skills and personalities to the team, contributing to their effectiveness in combat. The group is mentored by Dr. Nanbara and supported by his daughter, Chizuru, who also serves as the team's communications officer.

The narrative unfolds episodically, with the Battle Team facing off against the Campbellians' various monstrous mecha and schemes. The aliens, led by the enigmatic Emperor Campbell, deploy a series of increasingly powerful and destructive weapons to subjugate Earth. The Battle Team must not only master the operation of Combattler V but also learn to work together as a cohesive unit to overcome these threats. The series explores themes of teamwork, sacrifice, and resilience as the team confronts both external enemies and internal challenges.

As the story progresses, the stakes escalate, with the Campbellians revealing their ultimate plan to terraform Earth into a habitable environment for their species, rendering it uninhabitable for humans. The Battle Team's missions become more perilous, culminating in a final confrontation with the Campbellians' most formidable weapon. The series concludes with the Battle Team's decisive victory, securing Earth's safety and demonstrating the power of unity and determination in the face of overwhelming odds.