The story follows Rimuru Tempest, the wise and benevolent ruler of the Jura Tempest Federation, as he unexpectedly finds himself transported to the bustling city of Orario, the heart of the "Danmachi" universe. Stranded in this unfamiliar realm, Rimuru must navigate the complexities of Orario's labyrinthine streets and guilds, all while concealing his true identity as a powerful slime.