"Voltage Fighter Gowcaizer" is a 12-episode anime series based on the 1995 fighting game by Technos Japan. The story centers on Tsurugi Jo, a high school student who becomes the chosen warrior to protect Earth from the malevolent forces of the Dark Joker organization. After the death of his father, Tsurugi inherits the Gowcaizer armor, a powerful suit that grants him extraordinary abilities. The armor is part of a legacy tied to the Voltage Fighters, warriors tasked with defending the planet from supernatural threats.

The Dark Joker, led by the enigmatic and ruthless Kuros, seeks to plunge the world into chaos by exploiting humanity's negative emotions. Kuros and his followers, including the sinister Voltage Fighters under his control, aim to awaken the Dark Seed, a destructive force capable of annihilating Earth. Tsurugi, guided by his mentor and father figure, Professor Kanzaki, must master the Gowcaizer armor and harness its full potential to combat the growing threat. Along the way, he encounters other Voltage Fighters, some of whom become allies while others remain adversaries.

Key characters include Tsurugi's childhood friend, Mai, who provides emotional support and becomes a target for Dark Joker's schemes. Another significant figure is Kuros' daughter, Karen, who struggles with her loyalty to her father and her growing empathy for Tsurugi's cause. The series explores themes of sacrifice, redemption, and the struggle between light and darkness as Tsurugi battles both external enemies and his own inner doubts.

The narrative unfolds through a series of confrontations between Tsurugi and the Dark Joker's forces, culminating in a final showdown to prevent the awakening of the Dark Seed. The series blends action, drama, and supernatural elements, with a focus on Tsurugi's growth as a warrior and his determination to protect those he cares about. The story concludes with a resolution that ties together the fates of the main characters and the legacy of the Voltage Fighters.