Kiranjit Ahluwalia (Aishwarya Rai), a Punjabi woman, marries Deepak Ahluwalia (Naveen Andrews) in an arranged marriage and moves to Southall, UK with him to be closer to his family. Initially he seems caring and affectionate towards her but soon enough the true colours of her husband begin to show as Deepak gradually reveals a darker, threatening, and even sociopathic side of himself. After enduring ten years of abuse and having two children with him, Kiranjit, unable to bear the brutality and repeated rapes at the hands of her husband any longer, sets fire to his feet while he is sleeping, unintentionally killing him. Charged with murder, her case comes to the notice of a group of South Asian social workers running an under funded organization called the Southall Black Sisters.