Based on a stranger than fiction true story, a 1920s English seaside town bears witness to a dark and absurd scandal in this riotous mystery comedy. When deeply conservative Edith and fellow residents begin to receive wicked letters full of unintentionally hilarious profanities, foulmouthed Irish migrant Rose Gooding is charged with the crime. As the town’s women investigate the crime, they suspect that something is amiss, and Rose may not be the culprit.