Could a single scandalous painting rock two British monarchies, centuries apart... and threaten the lives of everyone who knows of its existence? It could--if the painting contains proof of a liaison between a prostitute and a prince.

The evidence, a painting by William Hogarth done in 1732, was supposedly destroyed. But hundreds of years later, on a private jet, Sir Oliver Peters learns that it still exists. Dying of cancer, and desperate to secure his family's well-being, Sir Oliver resolves to find the missing work. But when a fellow passenger who also knows the secret is murdered, he realizes he's battling more than time.