"Nazca" is a 12-episode anime series that blends historical reincarnation, ancient civilizations, and modern-day conflicts. The story centers on Kyoji Miura, a high school student and talented kendo practitioner, and his art teacher, Tate Masanari. Their lives take a dramatic turn when Kyoji begins experiencing vivid visions of a past life as Yawaru, a warrior from the ancient Inca civilization. Tate, revealed to be the reincarnation of Bilka, Yawaru's rival, becomes entangled in a complex web of destiny and revenge that spans centuries.

The narrative explores the concept of reincarnation and the lingering influence of past lives on the present. Kyoji's visions reveal a tragic love triangle involving Yawaru, Bilka, and a woman named Icaru, who is reincarnated as Kyoji's classmate, Sayoko Amano. As Kyoji uncovers more about his past, he struggles to reconcile his modern identity with the memories and emotions of Yawaru. Meanwhile, Tate, driven by his memories as Bilka, seeks to fulfill his ancient vendetta against Yawaru, leading to escalating tensions between the two.

The series delves into themes of fate, identity, and the cyclical nature of history. The characters are forced to confront the consequences of their past actions, as the lines between their former and current selves blur. The conflict between Kyoji and Tate intensifies as they grapple with their shared history, culminating in a confrontation that tests their understanding of loyalty, love, and redemption.

Supporting characters, such as Sayoko and other reincarnated figures from the Inca era, add depth to the story, highlighting the interconnectedness of their lives across time. The series balances its historical and mystical elements with personal drama, creating a narrative that is both introspective and action-driven. The resolution of the story hinges on whether the characters can break free from the cycle of vengeance or remain bound by the echoes of their past.