The series centres on the dysfunctional lives of Cameron, Sue, Sue's daughter, Emily, Sue's ex-husband and DJ Paul, his new girlfriend Natasha, Cameron's ex-wife Anne and their son Jack. The main plot follows Cameron's family life at home, dealing with life living as a step family. The plot is told in a backwards flashback mode. Arguments and tensions rise throughout the story, and eventually, following her strange and naughty behaviour, little Emily is killed. Any one of the adults could have been responsible – and were all placed at the scene.
As the plot reaches its climax, Cameron is shown hitting Emily and accidentally smashing her through a glass patio door, however there is a twist to the tale as all the suspects are then seen killing her one by one – all except one of them. Natasha, the only character not seen killing Emily, is seen crying and sobbing whilst shouting "I'm sorry". This scene was particularly disliked by some critics,[who?] because viewers were not shown how or indeed why, or if, Natasha killed her. That, however, said the writer, was the crux of the drama, that any one of them could have, and that her position within her family had become so marginalized that she was, at times, perceived as a nuisance or problem by all of them.[citation needed]