Only she knows the truth. Only he can tell the world. Vienna, 1946. A brilliant German scientist spirited out of the ruins Nazi Europe in search of a new life. Moscow, 1964. A rising star of the British diplomatic service whose job is not what it seems. London, the present day. A once promising academic offered an opportunity to seal his place in history. Their stories, their lives, and the fate of the world, are bound by a single document: The Scarlet Papers. The devastating secrets contained within teased by a brief invitation: Tomorrow 11AM. Take a cab and pay in cash. Tell no one.

Emma Carpenter lives in isolation with her golden retriever Laika, house-sitting an old beachfront home on the rainy Washington coast. Her only human contact is her enigmatic old neighbor, Deek, and (via text) the house’s owner, Jules. One day, she reads a poorly written—but gruesome—horror novel by the author H. G. Kane, and posts a one-star review that drags her into an online argument with none other than the author himself. Soon after, disturbing incidents start to occur at night.

It is the dawn of the 1960s. In order to investigate the gruesome death of a brilliant young physicist, KGB officer Major Alexander Vasin must leave Moscow for Arzamas-16, a top-secret research city that does not appear on any map. There he comes up against the brightest, most cutthroat brain trust in Russia who, on the orders of Nikita Khrushchev himself, are building a nuclear weapon with 3,800 times the destructive potential of the Hiroshima bomb.

After his son is convicted of capital murder, Vietnam War veteran Jeremiah Fitzjurls takes over the care of his granddaughter, Joanna, raising her with as much warmth as can be found in an Ozark junkyard outfitted to be an armory. He teaches her how to shoot and fight, but there is not enough training in the world to protect her when the dreaded Ledfords, notorious meth dealers and fanatical white supremacists, come to collect on Joanna as payment for a long-overdue blood debt.

A Russian defector is found brutally murdered in a London hotel. Only four people knew he had turned - the four most important and powerful figures in Whitehall. There's only one conclusion - a mole has infiltrated the highest levels of the nation's security. Operating in secret from within Westminster's darkest corners, former spy Solomon Vine must uncover the traitor. Because Britain's future hangs in the balance. And with it the fate of the whole world.