Is nowhere safe in York? As the plague wreaks havoc on the city, Owen Archer must solve a puzzle involving scandal, theft, and murder sweeping through a local hospital.

York, 1369. As pestilence rages through the city of York, strange things are afoot at St. Leonard's Hospital. Corrodians are dying in mysterious circumstances and riches belonging to the hospital have been stolen.

An evil that knows no bounds.

When a fire claims the life of a corrodian and badly injures another, it's clear it was no accident—both men were violently attacked. With a suspicious death and a lay sister suspected of being behind the thefts, Sir Richard de Ravenser, Master of St. Leonard's, appeals to his uncle, the Archbishop of York, for Owen Archer's help.

A riddle within a riddle . . .

Can Owen restore harmony to the hospital? To solve the riddle of St. Leonard's, Owen must first solve a puzzle linked to one of the victims . . .