TIR-NAN-OG — THE ''LAND OF THE YOUNG'' — is a violent world, home to warring tribes who worship gods both benign and malevolent. One such tribe is the Sessair, brave warriors of enormous skill and the best of them is a young barbarian named Sláine Mac Roth. Sláine is, among other things, a master of the ''warp-spasm'' — channelling the mystical power of the Earth through his body to become a mighty, monstrous berserker!