Naofumi wakes up in a strange prison to find him and his party at level 1, and Filo missing. They start to raise their levels in order to escape, but things quickly turn against them when a dangerous monster suddenly appears…

Naofumi's party is teleported to Sikul, where Kizuna introduces the Vassal Weapon Hero, Ethnobalt. He says he can use a piece of Raphtalia's hair and Naofumi's blood as a catalyst that can create a shikigami to find her. He creates the shikigami, and they find…