Ray Breslin continues to operate his security company to some success, with senior members Hush and Abigail and newcomers Shu Ren, Jasper Kimbral, and Luke Graves as field operators. During a hostage rescue mission in Chechnya, Kimbral, trusting his computer algorithms, deviates from the mission objectives. This results in one of the hostages being shot, later dying of her wounds, and Breslin fires Kimbral.
A year later, Shu is contacted by his family to protect his cousin Yusheng Ma. Soon to announce groundbreaking satellite communications technology from his telecommunications company, Yusheng has been targeted by a rival company, Ruscho. After attending a party in Bangkok, Shu defends Yusheng from masked men, but both are stunned with M-26 military-grade tasers and kidnapped.
Later, Shu finds himself imprisoned in an unknown arena, where inmates are forced to fight. Shu is forced to brawl another prisoner and wins, and encounters fellow inmate Kimbral, who explains the prison is called Hades, where he has been held for several months. Luke, Hush, Abigail, and Breslin attempt to locate Shu after his and Yusheng’s disappearance.
Drawing on Breslin’s training to formulate an escape plan, Shu meets the warden Gregor Faust, who calls himself the “Zookeeper”, and learns that Faust wants Yusheng’s communications patents in exchange for their release. Yusheng tells Shu that he buried the technology for fear it could be used to hijack any nuclear launch system in the world, and they resolve to escape.
Breslin determines that Hades is funded by the same mysterious organization who funded the Tomb, and seeks help from an old contact, Trent DeRosa. While following a lead on Shu’s disappearance, Luke is caught and transferred to Hades.
Starring: Sylvester Stallone, Dave Bautista, Huang Xiaoming, Jaime King, Jesse Metcalfe, Wes Chatham, Titus Welliver, Curtis “50 Cent” Jackson,