在这部搏击之王4-入侵者动作/运动片中,David Sloan被人诬蔑为国际恐怖组织的成员，并以涉嫌谋杀的罪名被监禁。但是他并没有犯下这项罪行。在监禁期间， 他得知Tong Po绑架了他的妻子并劫持到了在墨西哥。联邦调查人员进行调查时，要求David带领他们进入Tong Po的大本营，条件是释放David。 David凭着自己的努力进入了Tong Po的跆拳道比赛，但如果他想找到自己的妻子的话，那他就必须打败其他的对手。为了自己的生命，为了妻子，他一定要获得胜利，这时，他已不再是罪犯了。
Sasha Mitchell ("Kickboxer 2&3") triumphantly returns to the ring as David Sloan, fighting not just for his survival, but for his beautiful wife, who has become the sexual captive of the despicable world champion, Tong Po. Framed, forgotten and furious, Sloan has been wasting away in prison, but the Feds agree to release him if he will get inside Tong Po's impenetrable Mexican fortress, protected by its deadly guards and adorned by its sexual slaves. Sloan has no choice but to enter into Po's tournament of champions, a savage battle where winner takes all - and to Sloan - that means everything! Reluctantly, alliances form with a few others to help him out.
