Two men meet by chance in the taxi queue outside Paddington station one January night. Richard is in his mid-forties, apparently happily married, with two children. Abe is young, and casually manipulative. The men share a taxi and, on impulse, Richard invites Abe into his home- an action that sends ripples not only through his own life and that of his wife, but also through the fragile existence of Abe's younger sister, Kirsty, who is herself unsure of the best way to settle down...