Sophie is determined to discover more about mysterious silent vampire Patrick. Discovering that he might have killed two girls more than 50 years ago, Sophie starts to explore the past, but in the process she discovers a terrible secret hidden in the body of an old woman.
As she explores further, Sophie discovers the haunting tale of Rose Tisser and Jessica Harper, two young girls who made the terrible mistake of encountering the last Sentinels in a deserted lighthouse. Meanwhile, Sophie also meets Adam, who seems to offer everything that Patrick holds back.
The second Dark Season book takes place over a 50 year period. The first part of the story is told from Sophie’s point of view, as she investigates the deaths of Rose Tisser and Jessica Harper back in the 1960s. The second part of the story is told from the point of view of Rose Tisser herself, as she and her friend Jessica investigated a supposedly haunted lighthouse.
As Sophie starts to uncover the truth, she discovers that the mystery is linked to the Sentinels, a race of creatures who fought in the vampire war and were almost completely wiped out. But before they died, the Sentinels left behind a final legacy for humanity, a legacy that Sophie finally discovers hidden in the body of an old lady.