In a women's shelter in London, Marnie is doing her best to care for her four-year-old daughter. But it would be a lot easier if she had the support of her case workers, or if she could finally ditch the three useless ex-boyfriends that keep hanging around her. Mouthy, headstrong and maybe just a tad crazy, Marnie is going to prove to everyone that she's a competent mother. Because she is .. .isn't she?