2500 years ago, in India, Siddhartha was born as a prince of the Shakya clan, but he gives up his position as a prince to see the world. He meets a strange boy named Assaji, who can predict the future, a monk with only one eye and Depa. Siddhartha continues traveling. Siddhartha is overwhelmed by the sufferings he witnesses around him. Meanwhile, Prince Ruri of Kosara begins his attack on the Shakya clan. Second Buddha movie from Tezuka Productions.

Prince Siddhartha is heir to the Shakya kingdom, which is constantly at war with the more powerful Kosala kingdom. His father tries to raise as him as a warrior leader and to shield him from the miseries of the world. Meeting the young outcast girl Migaila, Siddhartha experiences love for the first time but also witnesses the suffering that afflicts humankind. Meanwhile, in Kosala, Chapra rises through the military, despite his lowly origins, to become a hero and general of the army. A final showdown between the two kingdoms forces Siddhartha to re-evaluate the path he is following.

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