The three spirits-- Body, Soul, and Mind-- have voices. 

And they don't speak to him. 

They speak through him. 

Crown Prince Tarence once thought curing a curse was as simple as making a bargain, but when the bargain binds him to every spirit and prophecy on his island, he is tasked with uniting with his enemies before the spirits turn him into their weapon. 

With the enemy princess' promise of a way to bind spirits outside a host, Tarence and his brothers travel across borders to seek an alliance under one banner and save him from the spirits' control. 

But alliance means more than handshakes and treaties, and when a bond of unity comes between him and his brothers, he must decide which bonds he must hold strong and which he's willing to break. 

Even if it costs him his life. Or worse. 

His soul.