The movie starts at the 1998 bomb attack by the Real IRA at Omagh, Northern Ireland. The attack killed 31 people. Michael Gallagher one of the relatives of the victims starts an examination to bring the people responsible to court.
Gerard McSorley
as Michael Gallagher
Michèle Forbes
as Patsy Gallagher
Brenda Fricker
as Nuala O'Loan
Stuart Graham
as Victor Barker
Peter Ballance
as Mark Breslin
Brendan Coyle
as Detective Sergeant John White
Ian McElhinney
as Stanley McCombe
Stanley Townsend
as Sam Pollock
Fiona Glascott
as Cathy Gallagher
Pauline Hutton
as Sharon Gallagher
Kathy Kiera Clarke
as Elizabeth Gibson
Claire Connor
as Caroline Gibson