The Order of the Holy Sepulchre is an elite group of specially trained nuns, the world's most powerful exorcists. But they don't just get rid of the demons they exorcise — the Sisters draw the demons into themselves, using their own bodies as cages of flesh. If they die a natural death, the demons die with them, small pieces of the world's evil gone forever, but if the Sisters should die violently then the demons are released into the world again! Now someone has sent assassins to kill the oldest of the sisters, releasing the captive demons out into the world. Eden Parish is assigned the task of discovering who is behind this massacre, and why. In her journey she will uncover dark secrets about the Order, and about their enemies — and the real reason behind all this murder!