Edinburgh, 1959 the 9th Mirabelle Bevan mystery is set in a nunnery in the shadow of the Forth Road Bridge which is under construction. About to get married, Mirabelle and her fiancé retired Superintendent Alan McGregor are torn about where they will settle but when a once-in-a-lifetime opportunity comes up to buy a secluded house on the banks of the Firth of Forth, they submit to getting permission from the local landlord.