This Muse needs no lyre to inspire. Her song is in her sword.

When Muse Calliope and her sisters flee from burning Greece, the Titan Mnemosyne tells them it is north they need to go: to a barbarian land the natives call Britain. There the Greek goddesses can find shelter and spread their culture for the benefit of the land's inhabitants.

But Britain proves to be a hostile land, filled with fire-breathing demons and snake-shaped gods, where the strong prey on the weak and men believe the only way to deal with life is by the sharp edge of a sword.

Calliope realizes that to help Britain prosper she needs to embrace a culture where the sword is a symbol of justice and power.

Can the sword in the stone help her find the pure-hearted leader who will give Britain its much-needed peace, or will she fail in her mission and see it succumb to blood and anarchy?