The tale of three friends on a South London estate and the summer that changes their lives.

Leah, who has been excluded from school, spends her time listening to Mama Cass. Jamie, her bright but shy neighbour, argues with his mum. Jamie's neighbour Ste is the popular, good-looking kid, but at home he tries to hide from his drunken father. When Jamie and Ste sleep top-to-tail one night they discover an urge to be more than just friends.