The evening before he must supervise a large concrete pour in Birmingham (the largest non-nuclear facility concrete pour in European history), construction foreman Ivan Locke learns that Bethan, a colleague from a job in Croydon with whom he had a one-night stand seven months before (which resulted in her becoming pregnant), has gone into premature labour. Despite his job responsibilities and although his wife and sons are eagerly awaiting his arrival home to watch an important football match, Locke decides to drive to London to be with Bethan during childbirth. Locke never forgave his father for abandoning him as a child, and he is determined not to make the same mistake, even though he has no relationship with, nor any particular feelings for, Bethan.