In the Yorkshire countryside, working-class tomboy Mona meets the exotic, pampered Tamsin. To seal their friendship, Mona introduces Tamsin to her born-again Christian brother and helps her spy on her adulterous father. Bound together by their secrets, the two girls see their friendship deepen and enter into dangerous waters.
Natalie Press
as Mona
Emily Blunt
as Tamsin
Paddy Considine
as Phil
Dean Andrews
as Ricky
Michelle Byrne
as Ricky's Wife
Paul Antony-Barber
as Tamsin's Father
Lynette Edwards
as Tamsin's Mother
Kathryn Sumner
as Sadie
