Of the prize-winning line-up of liars and addicts that life has thrown at me, Olivia, it was clear, took the palm, the laurel wreath, the whole triumphad arch. It was also clear, from the day we met, that I felt as if I'd known her forever. Two young women: one a single mother struggling to bring up her young family and keep her career afloat, the other an ex-drug addict who loves children and needs a job. When Olivia - on the face of it a highly unsuitable babysitter - moves in, trailing her chaotic past behind her, their lives collide with unexpected results.