Though the academy is at peace, the outside world is still in turmoil, leaving the assassins to fight their deadliest foe yet-themselves. A cold case. A coven gone dark. Morgan and her men decide to take some time away from the Academy to cement their bonds and investigate the mysterious disappearance. Unfortunately, what should've been a routine mission quickly goes sideways when they're attacked, turning their intimate vacation into a nightmare. The weakening wards around the coven are the only thing keeping the evil from spilling into the human world . . . and holding the Assassins captive. Escaping would mean leaving one of her own behind to battle the ancient evil alone. Not happening. Which means they need to discover a way to send the beasts that escaped from hell back to where they belong . . . before Morgan and her men become monsters themselves. Contains mature themes.