When Xena travels to Brittania to help stop Caesar's invasion, Gabrielle is tricked into losing her blood innocence, by taking the life of an innocent, which binds her to the evil ""one god"" Dahuk.

After trying to kill one another, grief-stricken Xena and Gabrielle awake in a strange land called Illusia, filled with familiar faces, where they must face the pain and anger caused by the deaths of their children and forgive one another in order to live.