Immortal warrior and Spartan slave River Kassandros has a special gift — the ability to transform into any weapon. But in a recent battle, he was trapped as a dagger, unable to become human again. His one hope of salvation is a mere mortal...

When Emma Lowery beaches her kayak on an uninhabited island off the coast of Savannah, an ancient dagger seems to call out to her. Compelled by dark forces, Emma draws blood with his blade, freeing River. Now he’s stronger, angrier — and exudes more sensuality than Emma can resist.

But a sinister power wants to claim River’s destiny, and his precarious freedom. The pair must join the Spartan warriors to fight Ares himself. But can they face sacrificing their love to protect humankind from the war god’s demonic plan?