A grieving daughter discovers letters in her late father's desk that make her question everything she thought she knew about him. Did he murder her mother? Is her sister really her sister? A shattering journey into the past follows, as she tries to find out what really happened in a remote Highland village twenty years ago.

It is 18 years since Danni's husband and three-year-old son were killed by an IRA bomb in central Glasgow, and she still can't move on from the tragedy that has blighted her life. As a fresh wave of violence sweeps through Ireland, she decides she needs revenge.