Paradise City, where the divine beasts rest. This place is ruled by the organization Abyss, which exploits the divine beasts' power. Ha-woon, a former police officer who lost his family to Abyss, accidentally obtains the 'Huntdog System', the only means of countering the divine beasts' power. However, as he fights Abyss, he learns that Paradise City and the divine beasts have a big secret...