"Medical researchers Kata Benecky and Beya Marquesa visit Sing Sing prison during the transfer of a notorious murderer. When a mass riot breaks out at the prison, a strange phenomenon follows that leaves Kata, Beya, and accompanying Detective Asher Keln alongside a horde of dead prisoners. Unbeknownst to Asher, Kata and Beya are Matriarchs-an immortal race of women with supernatural abilities who feed on the vital force of the living. With six prisoner escapees who may be aware of their existence, and a convocation of matrons pressuring them, Kata and Beya find themselves at a moral crossroads between sparing the escaped prisoners or protecting their race's exposure by finishing them off"-- Provided by publisher.