Eternia celebrates Teela as its new Man-At-Arms, but the knighting ceremony is cut short when Skeletor leads a full-scale attack on Grayskull.

As Evil-Lyn begins to doubt Skeletor's motives, she recalls how she first met the power-mad tyrant and ultimately decides to make an unexpected move.

Aware of her legacy, Teela tries to manifest her powers to call for aid in their struggle against Evil-Lyn, while Adam partners with an unlikely ally.

Teela assumes her new role and Adam reclaims the Sword of Power as the final confrontation for the fate of Eternia — and the entire universe — begins.