Jackie, her husband Mark, and their eleven-year-old son, JJ, live in south London. As busy working parents, Jackie and Mark haven’t been physical in their relationship for a while. So when Jackie discovers she’s pregnant, she’s perplexed. Knowing that she hasn’t slept with anybody else, Jackie says nothing of her situation, trying to maintain everyday life. The pregnancy progresses but with unsettling side effects, and soon Jackie starts to fear for her state of mind.