To address the "blood rage" plague and protect their future, Matthew and Diana seek help from Diana's friend, Dr. Christopher Roberts , at Imperial College London. Diana uses her magic to prove their supernatural nature and secure his scientific assistance.

Baldwin , the new head of the De Clermont family, is displeased with the presence of multiple species at Sept-Tours. His rigid adherence to the Covenant leads to a confrontation with Diana, who argues the law has outlived its usefulness.

Diana discovers she is pregnant with twins , a revelation that complicates the family's safety as they face increasing threats from the Congregation and individual enemies.