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.
Michael Gallagher

Patsy Gallagher

Nuala O'Loan

Victor Barker

Mark Breslin
Detective Sergeant John White

Stanley McCombe

Sam Pollock

Cathy Gallagher

Sharon Gallagher
Elizabeth Gibson

Caroline Gibson
Hugh
Laurence Rush

Marion Radford

Carol Radford

Chief Constable Sir Ronnie Flanagan

Duty Sergeant

Patricia McLaughlin
Nurse

Anne McCombe
Pat Doherty
Ann (Patsy's Sister)