We have seen this sort of plot before; if you liked such films as Serpico and Sicario, this may be your cup of tea. The script is taut and the suspense level is maintained at a very high level. The intriguing questions is whether a decent, moral man can enter the dark world of drug kingpins without himself becoming just as corrupt as his targets.
The R rating is deserved; leave the grandkids at home for this one.
I should have quit while I was ahead. I decided to stay for a second film, Our Kind of Traitor, but the theater descended into chaos. I stood in line for thirty minutes and never reached the head of the line; I counted the people standing in line and stopped after I reached thirty. After the starting time had passed, I left the line and talked to a manager; he informed me that an unexpected busload of children had arrived and they had been given priority for tickets and other services. I may have to wait for the DVD to go on sale.