Yorkshire, 1969. Nell Lewis is four months into her new role as governor of HMP Brackerley when the prison takes on a catering contract for Brackerley village's wedding of the year. Almost all the female inmates are delighted to be involved in the celebrations, though Linda is desperate to avoid the event in case she is spotted, photographed, and once more appears on the front pages of the gutter press. During the wedding reception, one of the inmates discovers the father of the bride, Mr Chapin, stabbed to death behind the marquee. The murder shocks the close-knit village and police enlist Nell's help to solve the mystery. There are multiple suspects at the wedding, all with strong motives for wanting Mr Chaplain dead, but the prison workforce was closest to the scene of the crime . . .