The story of two sisters who grew up on the fractious Irish border. When one of them, who has been missing, finally returns home, the intense bond with her sister is re-ignited. Together they unearth their mother's past but uncovered secrets and resentments which have been buried deep, threaten to overwhelm them.

Karen, a young single mother, is bored by routine. Slot machines have become her secret thrill and addiction. With Christmas looming, a desperate hope for a big win sees her life spiral out of control.