Known as the 'Last Great Detective' but labeled by many as the 'Defeated Detective,' Shinjurou Yuuki is a young man deeply invested in unraveling mysteries. In a dystopian Tokyo, dark forces target him, testing his skills in a treacherous underworld. With even the supposed allies like the police against him, Shinjurou relies on his gifted partner Inga to unveil the hidden truths. Brace yourself for a showdown of wits and intrigue as secrets are exposed in the thrilling saga of UN-GO!