Sieg, a legionnaire from a disciplined and powerful organization, is summoned into a chaotic multiverse by an elf priestess named Siv. Stripped of his armor, clothes, and some of his psychic abilities, Sieg finds himself thrust into a bizarre war between rats worshiping a god of cheese and Siv's people. Struggling to adapt to the strange system of levels and magic that governs this world, he must navigate increasingly dangerous enemies, ethical dilemmas, and Siv's manipulative tendencies.