A 1920s English seaside town bears witness to a sinister scandal in this riotous mystery comedy. Based on a stranger than fiction true story, two neighbours: Conservative Edith Swan (Olivia Colman) and lively Rose Gooding (Jessie Buckley) find themselves at odds, with Rose accused of sending wicked letters. As the town's women, led by Police Officer Gladys Moss, probe deeper, doubts emerge about Rose's guilt, sparking a national uproar and trial.
