It's 1965 and Christopher Winter is trying to carve a new life, a new identity, beyond his days in British Intelligence. Recruited by London's gangland he now finds himself on the wrong side of the law - and about to discover that the secret service has a way of claiming back its own. Who is the fatally alluring succubus working honeytraps for foreign paymasters? What is the true secret of the Shadowless, a fabled criminal cabal deadlier than the Mafia? And why do both parties covet long- buried caskets said to hold the hearts of kings? Winter must confront the buried knowledge of his own past to survive - but is he ready to embrace the magic that created the darkness waiting there?