It started out as another mundane night duty in London for disgraced, ex-Detective Declan Cahill - and his orders were clear: to protect a gang leader who had been shot and was now lying wounded in hospital. A baby-sitting detail; simple enough... ...except for one thing: all the Gangs in London were on their way to finish the job! Without backup and in a hospital besieged, Cahill must protect the gang leader, turned informant, at all costs – and in so doing, break organised crime's grip on the capital once and for all! Hunted by every gang in the city Cahill must use all his skills to keep this crucial informant alive. Only then...maybe...Cahill could make up for his past mistakes. One thing was for certain: with the odds stacked against them, both fallen cop and gangster must fight a desperate battle together to survive the night... ...and it would be the longest night of their lives.