Cate Cahill sacrificed her home, her friends and her fiance to protect her sisters, and now one of them is turning against her . . .
The Sisterhood desperately needs Cate to come into her prophesied powers to fight against the ever-growing Brotherhood. A war-thirsty Sister offers to help her find answers - if Cate is willing to endanger everyone she loves.
Meanwhile, Maura will do anything to lead the witches to victory. Even if it means sacrifices. Even if it means overthrowing Cate. Even if it means all-out war.