A generous and stubborn elderly boxing coach gets along with everyone except his own son. They're reunited after the death of the old man's wife and forced to face old grievances.
When a headstrong street orphan, Seiya, in search of his abducted sister unwittingly taps into hidden powers, he discovers he might be the only person alive who can protect a reincarnated goddess, sent to watch over humanity. Can he let his past go and embrace his destiny to become a Knight of the Zodiac?