Good and Evil are constructs and even though most of us have the best of intentions, the things we do out of love and necessity don’t always lead down particularly sunny paths.

Deirdre McMuir, the eldest member of the Castle Blae Council and a woman who’s suffered abuse and strikes back at her abusers, becomes the mother to a special child she names Tam who saves her with his preternatural and immense power. In the years succeeding Tam’s birth and his show of ultimate strength, Deirdre makes hard decision after hard decision out of love for her family, but everything comes to a head when the God of Rain, a pagan conjurer who is legion, betrays their deal and starts killing more innocents in the Castle than was agreed upon.

Paganism and Christianity clash in this unsettling glimpse into medieval suffering and brutality, and Tam McMuir, along with his young friend, Flora, and the captain of Castle Blae’s guard, Catriona, is forced to uncover hard truths about his existence in order to defeat the God of Rain.