When the Black Death reappears in England in 1361, Oswald de Lacy knows that the safest place for his wife and young son is the island-fortress of Eden, where his eccentrically pious friend Godfrey has invited the family to stay to wait out the plague during the long, dark winter. But Oswald has barely had time to settle in when a brutal murder shocks the household and it soon becomes clear that the castle is not the stronghold of security that...