When Zoe Barry walks into Professor David Connolly's office and announces that she is his daughter, he is left reeling. Suddenly his family - imperfect, flawed but working - is trying to find space for someone new. But Zoe's stories don't quite add up, and lies become indistinguishable from truths. The family struggle to make sense of whether she is a sister, a daughter, a friend, an enemy. But no one could have expected where it all might end.