"Reign: The Conqueror" is a 26-episode anime series that reimagines the life of Alexander the Great, blending historical events with surreal and philosophical elements. The narrative begins with Alexander as a young prince in Macedonia, grappling with his identity and destiny. His father, King Philip II, seeks to unify the Greek city-states under Macedonian rule, while Alexander is tutored by the philosopher Aristotle, who instills in him a deep curiosity about the world and the nature of existence. The series explores Alexander's internal struggles, his relationship with his parents, and his growing ambition to surpass his father's legacy.

As Alexander matures, he becomes increasingly aware of his divine lineage, believing himself to be the son of Zeus. This belief fuels his desire to conquer the known world and spread Hellenistic culture. After Philip's assassination, Alexander ascends to the throne and embarks on a relentless campaign of expansion. The series chronicles his military strategies, battles, and interactions with diverse cultures, including the Persians, Egyptians, and Indians. Key historical figures such as Darius III of Persia and Cleitus, one of Alexander's trusted generals, play significant roles in the narrative.

The anime delves into Alexander's psychological and spiritual journey, portraying him as a visionary leader driven by a mix of ambition, curiosity, and a sense of divine purpose. His conquests are not merely physical but also intellectual, as he seeks to understand the mysteries of the universe and his place within it. The series incorporates metaphysical themes, exploring concepts of fate, free will, and the cyclical nature of history. Alexander's relationships with his companions, including his close friend Hephaestion and his horse Bucephalus, are central to the story, highlighting the personal costs of his ambitions.

"Reign: The Conqueror" combines historical drama with avant-garde storytelling, using abstract visuals and philosophical dialogue to convey Alexander's inner turmoil and the broader implications of his actions. The series concludes with Alexander's untimely death in Babylon, leaving his empire fragmented and his legacy open to interpretation. The narrative emphasizes the duality of his achievements and failures, presenting a complex portrait of one of history's most enigmatic figures.