Shadowhunter Mathew Fairchild and his loyal golden retriever Oscar Wilde. are aboard the Majestic, a grand 19th-century ocean Iiner sailing from Greece to Constantinople, as Matthew searches for answers about himself.
He wants nothing more than to mourn the death of a friend and peacefully enjoy his travels before reuniting with James Herondale and Cordella Carstairs at the London Institute of Shadowhunters —a secret society of angel-blooded humans who protect the mundane world from demons and Downworlders. But that's interruptyed when someone is murdered on the ship—-and a vampire Downworlder lurks in the darkness.
Together with Sylvain Verlac, a mysterious and captivating Parisian Shadowhunter with a secret grief of his own, Matthew must find the murderer on the Majestic before death strikes again.