Created from the aftermath of the last great battle of the gods, Lodoss and its kingdoms have been plagued by war for thousands of years. As a quiet peace and unity finally become foreseeable over the land, an unknown evil begins to stir. An ancient witch has awakened, bent on preserving the island of Lodoss by creating political unbalance throughout the many kingdoms and keeping any one from maintaining central control. Only a mixed-race party of six young champions, led by the young warrior Parn, stand between this new threat and Lodoss' descent back into the darkness of war and destruction.

Lodoss-tou Senki started as a Dungeons & Dragons setting with systems based on Tunnels & Trolls and Runescape. The popularity of the replays, or transcripts of the RPG sessions, led to the franchise's creation, starting with the first novel. Numerous adaptations have followed, including video games, various RPG books, radio plays, short stories, and more.

The first novel, Haiiro no Majo, was published in English as The Grey Witch by Seven Seas Entertainment on December 19, 2017. The first four novels were published in French by Calmann-Levy from February 14, 2006, to January 7, 2009. It was also released in Brazilian Portuguese by NewPOP Editora from June 7, 2021, to May 31, 2024.