The show follows Sally (Catherine Shepherd), who is about to marry David (Alex Macqueen), her nebbish boyfriend of ten years, when she encounters the charismatic Emma (Julia Davis).
The two fall into a romantic relationship, but what starts out as an exciting and sexy fling takes an unexpected turn when Emma reveals herself to be a nightmare.
[12] Metacritic gave it an average score of 77 out of 100, indicating "Generally favorable reviews".
[13] Sally4Ever was praised by Sean O'Grady of The Independent as "brilliant, but more than usually disturbing", describing the sex scene between Emma and Sally in the pilot episode as "Pervy, kinky, gruesome, cringey" and "one of Davis' finest scenes yet".
[14] In The Guardian, Lucy Mangan gave it four stars and applauded Julia Davis for fashioning "another wholly sadistic half hour that leaves the viewer skewered and writhing in exquisite agony".