Edinburgh, 1818: a gothic tale full of mystery and romance . . .

Hazel Sinnett is alone. The events of the past year - the immortality, Beecham's vial - feel near-imagined. And worse, she doesn't even know if Jack is still alive. All she can really do is run her free clinic in Hawthornden Castle, as it decays around her.

When Hazel finds herself unexpectedly arrested, she seems doomed to jail. Until she's offered an out: a role as personal physician to Princess Charlotte, the king's sickly daughter. Suddenly, Hazel is swept up by the glamour and secrecy of a court where everyone has something to hide.

Meanwhile, Jack Currer has been travelling across the Atlantic, seeking a cure to his immortality so that he can spend a normal life with Hazel. When he hears Beecham has died, he immediately rushes to London to discover how.

As their search for the immortality cure entangles them deeper in the British court, Hazel and Jack realise their love is not the only thing at stake. Malicious forces are at work in the monarchy - forces determined to claim eternal life at any cost. . .