Based on the comic by Greg Rucka and Leandro Fernandez, The Old Guard centers on a group of immortals – Andy (Charlize Theron), Booker (Matthias Schoenaerts), Joe (Marwan Kenzari), and Nicky (Luca Marinelli) – who have lived on Earth for hundreds of years. With the gift/curse of all that time, they together choose to dedicate their existences to try and generate the maximum amount of good in the world. Unfortunately they wind up getting hit with a serious double whammy of drama simultaneously, as the unit is first set up and exposed by a former CIA agent (Chiewtel Ejiofor) working for a powerful pharmaceutical executive (Harry Melling), and then they sense that a new person has joined their ranks as a marine named Nile Freeman (KiKi Layne) is killed while on tour in Afghanistan and then bizarrely wakes up without a scratch.
