Jason Dark is a member of MARSOC’s elite Bravo unit; a team of soldiers tasked with hunting down and eliminating the infamous assassin known as Chaos. But when Chaos is killed, his four sons avenge his death by brutally murdering Dark's comrades and setting into motion their maniacal plan to bring about the end of the modern world.
Now a team of international soldiers has been assembled and, with the help of Dark, they must race against time to stop the Four Horsemen of the Apocalypse from launching a devastating biological attack against Europe.