London, 1888

Mira Blayse is determined to uncover the truth behind her parents' deaths in 1870. With an artist's eye, she notices what others miss-but her investigations thus far have led nowhere. One morning at a café, she sketches a mysterious stranger, unaware that she is capturing the features of the man who will help her solve the case once and for all.

Byron Constantine is a brilliant detective, but his mind is fractured. He lives day-to-day, desperately fighting to hold onto his memories, only for them to slip away as he sleeps.

Assuming the role of his secretary, Mira's sharp eye for detail is the perfect complement to Byron's deductive genius. More than an assistant, she bridges the gaps in his memory. Together, they tackle a case from Scotland Yard: the suspicious death of airship operator Clement Pennington.

With the Whitechapel murders dominating London, they uncover hidden schemes and shadows of a secret society that may hold answers about Mira's own mystery. As the danger closes in, their partnership deepens-and Byron realizes there may be one memory he cannot afford to lose.

The first book in a gripping historical mystery series best enjoyed in order.