Carl Rizk, an ex-covert operative who's moved to a small quiet town in Oregon to raise his son and daughter gets awakened by a phone call and message from a modulated voice telling him that both his children have been kidnapped and buried alive with just enough air to survive for the next 5 hours. In order to ever see his children alive again, RIZK has to take on three distinct groups of highly-skilled criminals and kill each and every one of them. But he has to work alone and face increasing obstacles and levels of weaponry to uncover the identity of the man behind the macabre plot. The clock is ticking and RIZK can't waste any time or make any mistakes or he will lose his family forever.

Ninjitsu master Casey is back and out for revenge when his pregnant wife is murdered.

Russian inmate Boyka, now severely hobbled by the knee injury suffered at the end of Undisputed 2. No longer the feared prison fighter he was, he has declined so far that he is now good only for cleaning toilets. But when a new prison fight tournament begins - an international affair, matching the best fighters from prisons around the globe, enticing them with the promise of freedom for the winner - Boyka must reclaim his dignity and fight for his position in the tournament.

A westerner named Casey, studying Ninjutsu in Japan, is asked by the Sensei to return to New York to protect the legendary Yoroi Bitsu, an armored chest that contains the weapons of the last Koga Ninja.