Michaela Sommers, a twenty-first-century martial artist, investigates her father's murder and is haunted by dreams of Celtic battles. Maecha Ruadh mac Art must save her father, the High King of
Celtic Ireland, and become the leader of a male band of warriors. Michaela plunges into Maecha's dream world and teaches her the fighting skills needed to enter the Cave of the Warrior with her
Champion, Kelan mac Nessa, and survive three deadly challenges.