Tied to St Mungo's Cross by the cathedral to be cured of her madness overnight by the saint, the young woman is found in the morning beaten and strangled, still tied to the cross. But is she who she seems to be? And who would flout the saint's protection like this? Gil Cunningham must trace the dead woman and find her enemies, track down the thieves and murderers and identify the watchers in the shadows, particularly the elusive fourth person who holds the secret of what happened that night. Questioning cathedral staff and apprentice boys, pilgrims and tradesmen, he uncovers only more puzzles.

Gil Cunningham had hoped that the first time he set foot in the brothel on the Drygate it would also be his last, but by the time all was settled he felt quite at home within its artfully painted chambers. The bawdy house, along with the neighbouring property and two more in Strathblane, are all part of a deal offered to Gil and his wife Alys by the forceful Dame Isabella.

Although he was watching closely when the mummer was poisoned, it took Gil Cunningham several days and three more poisonings to work out how it was done. Danny Gibson and Nanty Bothwell, rivals for the affections of Agnes Renfrew, the apothecary's pretty daughter, are also good friends.

Salisbury, 1226. A young pregnant woman is found tangled in reeds in the river Avon, her identity a mystery. Grieving widow Ela Longespée is determined to succeed her husband as sheriff of Salisbury, and quickly takes charge of the investigation. She soon finds herself in the thick of a neighborhood scandal and a struggle to maintain her authority. With multiple suspects, can she identify the true killer? 

Glasgow, 1492: Gil Cunningham remarked later that if he had known he would find a corpse in the university coalhouse, he would never have gone to the Arts Faculty feast. In this mysterious adventure Gil Cunningham returns to his old university for the Nicholas Feast, where he and his colleagues are entertained by a play presented by some of the students. One of the actors, William Irvine, is later found murdered and Gil, assisted by Alys, begins to disentangle a complex web of espionage and blackmail involving William's tutors and fellow students.