Sister Boniface Mysteries dives into the endearing world of Great Slaughter and its secret weapon in its fight against crime, Sister Boniface. At a time when police forensics is rudimentary, Boniface's I.Q. of 156, her PHD in forensic science, plus an addiction to popular detective fiction and a fully equipped crime laboratory make her an invaluable aid to Police investigations. Mud, blood, stains, hairs and fibres. If there is evidence to be found Boniface will find it. Poisons, trace evidence, blood stains, etymology. She's more up to speed on the latest forensic techniques than the Police.
Sister Reginald's ex-con brother Alfie abruptly shows up at the convent after being released from jail. With nowhere to go, the sisters agree to let him stay. But when a well-known artist is found murdered, Alfie begins to look like the prime suspect.
The dreamy frontman of buzzy rock 'n' roll band The Queenmakers is found dead in the dressing room, just as they are about to go on for their set. Upon inspection, Sister Boniface finds a peculiar sting on the back of his neck.