Grisell Dacre is the daughter of a northern baron, but she's being reared in the household of the Earl of Salisbury, alongside her intended spouse, Leonard Copeland. One day, by accident, Leonard triggers a barrell of black powder in the courtyard of the castle and Grisell is severely injuried. She gets severe burns to her face, which will mark her forever. Leonard's father refuses to allow the marriage between her and his son, so Grisell is sent to Amesbury Priory to live with the nuns, who treat her very well and teach her the healing arts. Grisell fears no one will ever love her now that she is disfigured, but Sister Avice tells her she will have to show her goodness and kindness to be loved and accepted. When she is 15, Grisell is sent away by the new Proctor because she has no dowry, and she goes back to her parents, who are not very loving. Her mother prefers her two brothers, Robin who is the older and Bernard, a sickly child. When he first sees Grisell, Bernard is afraid of her and calls her "Grisly Grisell", but soon Grisell, with her love and care, wins his affections, to the point the child only wants to stay with her. Soon her ex fianceè Leonard, who fights on the Lancastrian side, is captured in battle and Grisell's father forces him to marry Grisell. But Leonard is in love with another dame... and Grisell, who loves him nonetheless, resolves to put in practice again sister Avice's advise.
Grisly Grisell is a nice and moving tale in which the historical events are just the frame for a touching message.