Gina (Ruth Gemmell) is struggling to keep an aggressive loan shark at bay. When she meets Carol (Cathy Tyson) another single mother who appears to have no financial worries she is keen to know her secret. Her newfound friendship with Carol draws Gina into the sisterhood of the streets a fiercely loyal network that underpins the harsh realities of the oldest profession in the world. When a murder is discovered on their patch the women close ranks as their lives become inextricably bound up in the search for the killer.