An agent sent to Muscovy to investigate suspected treason amongst employees of the Muscovy Company has disappeared without trace on the way to Astrakhan.
Christoval Alvarez, physician and former Walsingham agent, is.
The perfect opportunity comes when the Tsar, Emperor of All the Russias, asks for an English physician to treat his young half brother.
Sir Francis Walsingham, who began the investigation, is dead, but the directors of the Company know that the agent must be found, dead or alive.
An agent sent to Muscovy to investigate suspected treason amongst employees of the Muscovy Company has disappeared without trace on the way to Astrakhan