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. But that...

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. But that permission comes at a price and when a nun dies in mysterious circumstances at the Little Sisters of Gethsemane Convent nearby they are drafted to uncover what happened.