86 BC, Ancient Europe. The Celts are an increasing menace for the weaker tribes who need to find their own means to survive. Faced with an irresistible bargain, young chieftain Kersas makes a difficult choice for the sake of his people. Many full moons later, novice priest Niva returns from amongst the Druids to Thrace – the very land Kersas is set to protect. But what if one clan’s protection means another one’s demise?