A small-time Belfast thief, Gerry Conlon, is wrongly convicted of an IRA bombing in London, along with his father and friends, and spends 15 years in prison fighting to prove his innocence.
The big national crime syndicate has moved into town, partnering up with local crime boss Nick Scanlon. McQuigg, the only honest police captain on the force, and his loyal patrolman, Johnson, take on the violent Nick.
Mary Turner gets a three year prison sentence for a crime she didn't commit. Once released, she plots to get back at the man responsible for her conviction.