It's now 1955 and Chief Inspector Sullivan and Mrs Devine have grown closer since we saw them last - something that hasn't escaped the notice of Father Brown and Brenda. With a food fayre to die for, a real-life crime at a crime writing festival and a village rivalry that turns deadly, there's plenty for the gang to be busy with. And when his old friend Sister Boniface is implicated in a murder at an arts and craft fair, Father Brown must prove her innocence - before it's too late.