Only five hours remain before the god-killer arrow lodged in Athena's chest kills her, and the Grand Master is the only one who might be able to save her, if Seiya and his fellow Bronze Knights can fight their way to his chamber in time. This direct continuation of Battle for Sanctuary sends the same five Bronze Knights climbing through Sanctuary's remaining Houses, each guarded by a Gold Knight standing between them and the Grand Master. This second ONA season keeps adapting the Twelve Houses arc from where the first part left off.