The year is 1579.
"William Constable - physician and unwilling spy - is in Plymouth waiting to sail to the New World. The expedition, led by renowned explorers and traders, John Hawkins and Sir Humphrey Gilbert, has already suffered birth pangs.
William's friend, Captain Charles Wicken, is accused of killing the son of a wealthy merchant, but the testimonies appear suspect. When William learns that Wicken is one of Walsingham’s agents he uncovers evidence to suggest the murder and Wicken’s naming are designed to conceal a plot of invasion - backed by Rome and Spain."