Newcastle, 1978.
John is sleeping with Mary.
Mary is married to Daniel.
Both men work for her father, the Top Man.
Daniel is his son-in-law, next in line to take over his little empire.
John is muscle.
The Top Man orchestrates robberies-banks, pay rolls, anything that will bring in some easy money.
When Daniel discovers his wife's illicit liaison, he wants John dead.
The Top Man signs off on it.
But John's a man you only get one shot at.
When Daniel happens to botch that one shot, then .