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
CinemaSerf
On the face of it, "Mona" (Natalie Press) is a bit of a tomboy with few friends and an untrusting nature. When she meets the rather more entitled "Tamsin" (Emily Blunt) you'd expect sparks to fly, but gradually the pair realise that they have more in common than they'd initially thought with their o...