When Hester Lane arrives in England, she swiftly discovers her true identity as Hester Jekyll, niece of the respected Dr. Henry Jekyll. But the inheritance she thought she could claim easily proves to be elusive... the friends she thought she had made are suddenly untrustworthy and aloof... and she finds herself entangled in the frightening mystery of her uncle's past. And as a series of brutal deaths begins and Hester is haunted by a dark, terrifying figure, she is forced to ask a new question: Have we truly seen the last of Dr. Jekyll... or Mr. Hyde?