Jo, a neglected and free-spirited teenager, lives in a dreary Manchester apartment with her promiscuous and self-absorbed mother, Helen. Their turbulent relationship intensifies as Helen frequently abandons Jo for her own romantic escapades. Feeling unloved and isolated, Jo finds solace in a brief but impactful relationship with Jimmy, a charming black sailor who showers her with affection. Though Jimmy's stay is transient, their connection leaves Jo significantly changed.

As Jo navigates her life in Jimmy's absence, she meets Geoff, a kind-hearted and openly gay art student who becomes her closest companion and confidant. Together, they attempt to create a semblance of family and stability in Jo's life. Along the way, they face numerous societal prejudices and personal challenges. Their bond grows stronger as they support each other, providing glimmers of hope and resilience against their bleak circumstances.