The story at the beginning of the movie is very attractive, thinking that it is a case, but I did not expect it to be a simulation training, and thus officially led to the werewolf-like ultimate death island. The murderer took advantage of everyone's strengths and weaknesses, carefully designed a series of traps, according to a specific time and arrangement to let others die one after another, which is very clever, not only to guide the killing, but also to stir up discord from time to time, absolutely a high-IQ criminal. Similarly, he is also a pervert, the purpose of his killing is to hope that others can see through him to catch him, the play appears many times to induce others to seem to be full of loopholes, in fact, he is using people's psychology, the more the answer is placed in front of the less people believe, so this is not a bug in the design of the script, but a blind spot of human nature.
The FBI Task Force is about to be sent to a small island for test training, and Seven members of The Division, including Reston, Vince, Sarah, Nicole, and Lucas, will go with Instructor Harris and Inspector Gabe to find the hidden serial killer and complete Harris's mission. A cat dies in the base without anyone's perception, much like a death trailer, and then the crowd touches the domino design in a simulated crime scene, and THE JD is frozen to death by refrigerant. The crowd finally believed that there was really a killer killing them, which was not simulation training at all, so everyone began to face up to the death they were about to face. Using the heat sensor, everyone searched the island, but unfortunately there was no gain, that is, Harris was either not on the island or was dead, and there was no so-called serial killer, the murderer was among them.
In the second round, the killer drugged the coffee, everyone fainted, and when they woke up, Leif was killed, leaving a lot of numbers at the scene. The crowd suspected Inspector Gabe because he had a map in his room, while the others went to decipher the numbers and found the four letters "a/o/r/t", at which point both he and Vince would have been electrocuted if Gabe had not turned off the electric gate. Lucas proposed closing the sluice gates, only to have Bobby stabbed to death, and his suspicions skyrocketed, but no one was sure. The crowd also deciphered the English words, believing that the murderer was trying to recreate the legend of the island, a legend about the unsolved mystery of the disappearance of mankind. This short passage doesn't seem to be of much use except to prove that Vince is good at history.
In the third round, the crowd found the blood of the suspected murderer in Leif's nails, and through comparison, it was found that it was sarah, and Niko wanted to kill her and was opposed by everyone, so he went out to smoke and died in the trap of the murderer. By this time the murderer had been thoroughly exposed, and when Nicole wanted to smoke, Lucas inadvertently said that you are the same as me. Combined with the bar and the plot when landing on the island, Lucas's deliberate selling flaws are still not noticed, and it is no wonder that he is becoming more and more confident.
Harris's voice suddenly sounded a good distraction, but it had been said earlier that Harris could not be on the island or alive, and sure enough, by the time Gabu, Sarah, and Lucas found him, he was dead. Gabu doesn't understand Sarah, perhaps because he discovers Vince's body and identifies Sarah as Lucas's accomplice, and in Lucas's calculations, he defends Sarah in every way from the beginning, which is difficult not to suspect, which also leads to Sarah almost killing Gabu. Sarah's final counter-killing is not like a werewolf killing, but very much like the Three Kingdoms killing, the lord just needs to watch the traitors and loyalists kill each other, who can't help but jump out who will lose.