While Sandra opens up to a documentary film crew, flashbacks show her teenage son, Stephen, mysteriously kidnapping a toddler, and holding him captive. Eventually, the stories intersect to explain the abduction and the family's three-generation legacy of abuse in this mesmerizing psychological drama.

In 1920s Ireland young doctor Damien O'Donovan prepares to depart for a new job in a London hospital. As he says his goodbyes at a friend's farm, British Black and Tans arrive, and a young man is killed. Damien joins his brother Teddy in the Irish Republican Army, but political events are soon set in motion that tear the brothers apart.