"Big Wars" is a science fiction anime set in a distant future where humanity faces an existential threat from an alien race known as the Aulians. The story unfolds against the backdrop of a prolonged interstellar war, with Earth's survival hanging in the balance. The narrative centers on Captain Akuh and his crew aboard the battleship God Noah, a technologically advanced vessel tasked with leading humanity's defense against the Aulians. The God Noah is equipped with powerful weaponry and a unique energy source, making it a critical asset in the war effort.

The Aulians, a highly advanced and enigmatic species, possess superior technology and a mysterious connection to ancient human history. Their motives for attacking Earth remain unclear, but their relentless assaults push humanity to the brink of extinction. As the war intensifies, Captain Akuh and his crew uncover startling revelations about the Aulians' origins and their ties to humanity's past. These discoveries suggest that the conflict may be rooted in a deeper, more complex history than initially understood.

Throughout the series, the crew of the God Noah faces numerous challenges, both external and internal. They must navigate the horrors of war, confront moral dilemmas, and grapple with the psychological toll of prolonged combat. Key characters include Captain Akuh, a determined and resourceful leader; Lieutenant Commander Kira, a skilled strategist with a mysterious past; and Dr. Hana, a scientist whose research into the Aulians becomes pivotal to the war effort. The interactions and relationships among the crew members add depth to the narrative, highlighting themes of loyalty, sacrifice, and the human cost of war.

As the story progresses, the God Noah embarks on a critical mission to strike at the heart of the Aulian forces. This mission leads to a climactic confrontation that tests the limits of human ingenuity and resilience. The series explores the consequences of war on both a personal and societal level, examining how individuals and civilizations are shaped by conflict. The resolution of the story ties together the threads of mystery surrounding the Aulians and humanity's shared history, offering a thought-provoking conclusion to the interstellar struggle.