"Cobra The Animation: The Psychogun" is a four-episode OVA series that serves as a continuation of the classic "Space Adventure Cobra" franchise. The story revolves around Cobra, a spacefaring adventurer with a cybernetic arm known as the Psychogun, which grants him immense firepower. Cobra, whose real identity is Johnson, is a former pirate who erased his memories to escape his dangerous past. However, his past catches up with him as he becomes entangled in a new conflict.

The narrative begins with Cobra living a quiet life on a remote planet, but his peaceful existence is disrupted when he encounters a mysterious woman named Dominique. She is pursued by a powerful organization known as the Pirate Guild, which seeks to exploit her unique abilities. Dominique possesses a rare psychic power that allows her to control a legendary weapon called the Time Drive, capable of manipulating time itself. The Pirate Guild, led by the ruthless Captain Vaiken, aims to use the Time Drive to dominate the galaxy.

Cobra decides to protect Dominique, reigniting his old instincts as a rogue hero. Along the way, he reunites with his trusted android companion, Lady Armaroid, who provides tactical support and combat assistance. The duo faces numerous challenges as they evade the Pirate Guild’s forces, including deadly assassins and advanced technology. Cobra’s Psychogun becomes a crucial tool in their battles, showcasing its destructive capabilities in high-stakes confrontations.

As the story progresses, Cobra and Dominique uncover deeper secrets about the Time Drive and its connection to an ancient civilization. The narrative explores themes of destiny, sacrifice, and the consequences of wielding immense power. Cobra’s past as a pirate also comes into play, revealing his complex relationship with the Pirate Guild and his reasons for abandoning his former life.

The series culminates in a climactic showdown between Cobra and Captain Vaiken, with the fate of the galaxy hanging in the balance. Cobra’s resourcefulness, combat skills, and unwavering determination are put to the test as he confronts the Pirate Guild’s ultimate weapon. The resolution ties together the central plot threads while leaving room for further adventures in the expansive "Cobra" universe.

The main characters include Cobra, a charismatic and skilled adventurer with a penchant for danger; Dominique, a mysterious woman with a pivotal role in the conflict; Lady Armaroid, Cobra’s loyal and capable android ally; and Captain Vaiken, the ruthless leader of the Pirate Guild. Each character contributes to the dynamic and fast-paced narrative, which blends action, science fiction, and elements of space opera. The series maintains a balance between episodic storytelling and overarching plot development, appealing to both longtime fans of the franchise and newcomers.