The Flanagans, Tanners and Lovells all live on the top floor of a crumbling Victorian tenement in the heart of London's East End. It's 1936 and Britain is in the grip of the Depression.

Nell Flanagan is a decent, hardworking woman, married to Stephen, a tough, heavy-drinking brute of a man, who works as a casual in the docks — when there's work available. Nell has hidden the abuse she has suffered at his hands from her young children, although most of the neighbours realise what's going on.

The Tanners think she must be asking for it, but nineteen-year-old Martin Lovell, has always admired Nell. When he sees Stephen actually attacking Nell, he can stand back no longer, but his actions have repercussions for all the families…