1997年的洛杉矶,黑帮横行,彼此贩毒,甚至不惜与警方对垒。这天,“蝎子帮”又与警方在街头展开枪战,赶来参战的火爆干探迈克奋不顾身,将匪徒们逼入一幢大楼内,没想到,等警方攻入大楼时却发现一地死尸,而且死状极为血腥。警方认为是另一黑帮“牙买加帮”所为。但紧接着,一伙牙买加帮成员在行凶时同样被杀死,并被剥皮后倒吊起来,迈克和丹尼正在现场调查,被联邦特派员杰斯阻挠。丹尼偷偷潜回现场,捡到—形似矛头的金属,却也不幸身亡。迈克将金属物送去化验,却发现不是地球之物。不久,凶手大闹地铁站,杀人无数,迈克紧追凶手,被杰斯手下捉住。杰斯无奈之下告诉迈克真相,原来凶手乃是10年前大战特种部队的外星猎人“铁血战士”,他们喜欢在星际以捕杀各种生物为乐,上次打了一回丛林战,这次则将洛杉矶的水泥森林当成了最理想的战区。除了隐身能力外,“铁血战士”更有多种高科技利器护身。杰斯为得到外星高科技,布下陷阱,想利用“铁血战士”的弱点予以活捉。这一切真的能如他所愿吗?或者还是要靠迈克死拼到底? In Los Angeles in 1997, gangsters rampant each other drug trafficking, and even hesitate to confront the police. This day, “Scorpion Gang” and the police in the streets with gun battles, came to the war's hot probe Mike Fen regardless of body, the culprits were forced into a building, did not expect, but when the police found the building but found a dead body, And deadly is extremely bloody. Police believe it is another gang to help “Jamaica.” But then, a group of Jamaica gang members were similarly killed at the time of the assault and were peeled and upside down. Mike and Danny were on the scene and were blocked by Federal Commissioner Jess. Danny secretly sneaked back to the scene, picked up - a spearhead of the metal, but unfortunately died. Mike sent the metal to the laboratory, but found it was not something on Earth. Soon, the murderer downtown subway station, killing countless, Mike chased the killer, caught by Jess. Jess desperation to tell the truth of Mike, the original murderer is the alien hunter “Predator” of the Special Forces of the World War 10 years ago, they like to kill a variety of creatures for music in the interstellar, the last hit a jungle war, this Second, the cement forest in Los Angeles as the best theater. In addition to stealth capabilities, “Predator” more variety of high-tech weapon protection. Jess to get extraterrestrial high-tech, cloth the trap, want to use the “Predator” weakness to capture. Is this really what he wants? Or is Mike still going to die in the end?