"Sailor Victory" centers on a group of young women who transform into magical warriors to protect Earth from an intergalactic threat. The narrative begins with the awakening of Sailor Victory, the leader of the Sailor Guardians, who discovers her destiny to unite a team of warriors scattered across the galaxy. Each guardian represents a celestial body and wields unique powers tied to their planetary affiliation. The primary antagonist is a malevolent force known as the Dark Nebula, which seeks to drain the energy of planets to fuel its expansion.

The story unfolds as the Sailor Guardians are gradually brought together, each facing personal trials and revelations about their past lives and responsibilities. Sailor Victory, also known as Aya, serves as the emotional core of the group, balancing her role as a leader with her struggles to understand her own identity and the weight of her mission. The other guardians—Sailor Mercury, Sailor Mars, Sailor Jupiter, and Sailor Venus—each contribute distinct abilities and personalities, forming a cohesive team despite initial conflicts and misunderstandings.

The plot is structured around episodic battles against agents of the Dark Nebula, interspersed with deeper arcs exploring the guardians' relationships and the overarching mystery of their origins. Key themes include friendship, sacrifice, and the resilience of hope in the face of despair. The series builds toward a climactic confrontation with the Dark Nebula's ruler, who is revealed to have a personal connection to Sailor Victory, adding emotional stakes to the final battle.

Character development is a central focus, with each guardian undergoing significant growth as they confront their fears and insecurities. The narrative also delves into the lore of the Sailor Guardians, revealing their ancient legacy and the cyclical nature of their battles against cosmic threats. The series balances action-packed sequences with moments of introspection, creating a dynamic and engaging storyline.