The new parish priest of Shrewsbury, Father Ailnoth, proves to be most unpopular with his parishioners. After refusing to baptize the illegitimate baby of a prostitute, he's found dead in the river; unsurprisingly, there is no shortage of murder suspects. Cadfael's (Derek Jacobi) subsequent investigation fails to expose the murderer, but a new clue presents itself when he finds the priest's old skull cap on a nail underneath the bridge. ~ Rebecca Flint Marx, Rovi