One day, Linus is suddenly reincarnated in another world and raised to become a superior Barrier Master in the Basam Marquess' Household. However, they are caught up in the Royal Army's rebellion and, along with the Royal Capital, the Marquess' family collapses. Having worked desperately to overcome his sadness, Linus finally reaches the neighboring country, the Hideta Empire. What new turmoil awaits him there?!