When there are only one percent of the population left on earth, do we really think that the amount of poisonous gas emitted will also be reduced to one percent?If the human population halved, what would happen to the survival rate of forests?These questions make us wonder whether we should value and protect the future of all living things more.

Imagine what it would be like if alien parasites suddenly descended on the Earth, invaded human bodies, and then started killing people at music festivals.Zheng Xiuren met a man in the supermarket who claimed to kill everyone. She only thought he was a difficult customer.However, after get off work, she was attacked with a knife by the man. Fortunately, the parasite attacked him first.This strange situation also confused the police. The original attacker turned out to be the deceased.What's even more strange is that Jung Soo In clearly suffered stab wounds, but after being sent to the hospital, he was told that these wounds were not made today.

When Zheng Xiuren woke up, she was confused that there were no stab wounds on her body, and she was also puzzled by the sudden death of the murderer.But she was sure she had been stabbed, because she was very familiar with the feeling that something bad had happened again.It turned out that when she was ten years old, she suffered domestic violence from her father, and it was her uncle who saved her.However, in fact, it was Jung Soo-in himself who called the police to report his father.A few months later, Seol Qiangyou launched an attack on Yeongdeungpo's boss, but the mission did not go smoothly and he had to flee.After returning home, he found that his sister was scary in her white dress, and learned from Jin Hee that her sister might be related to an organization called “Church”.

This “Church” is actually an organization composed of monsters that lure humans to join.Xue Qiangyou accidentally discovered the existence of this organization and discovered that his sister was also a member of it.When he secretly followed his sister, he discovered that Jung Soo-in was also being followed by a parasitic beast.It turns out that they are all of the same kind, and they hope that Zheng Xiuren will join the organization because only cooperation can survive.Xue Qiangyou witnessed all this and was panicked when faced with Zheng Xiuren who had turned into a monster.However, the parasitic beast did not kill Xue Qiangyou, but ordered him to do something.That is to tell Zheng Xiuren, never approach those who have brainwave sensors, and never follow them.Xue Qiangyou explained in the way of monsters that Zheng Xiuren's mind was originally going to be occupied by the monster, but because the injury was too severe, the monster could not eat her brain and occupy it.Therefore, Jung Soo In is regarded as a “variant”.

After returning home, Zheng Xiuren was confused about whether there was someone else inside her.Unexpectedly, after the five-minute clip, the self in her body actually had a text conversation with herself!He even told Zheng Xiuren all the truth.The next day, a special search team came from the police station. All security guards were at the highest level and the security was tight.Cui Junjing explained that the X-rays taken for everyone in the morning showed that there were no parasites in the entire police station.However, no one at the scene could figure out what she was going to do.Choi Joon Kyung explained that a parasite had appeared since the music festival, and that parasite was at the scene!

This parasite was captured by “Gray Team”.The larvae of this parasitic organism invade through the ears, nose and mouth of humans and take over their heads, essentially eating their brains.The mutated parasites follow their instincts and their only purpose is to eat humans.Their characteristic is that they can change their head shape at any time and transform into sharp knife-like weapons.These cells themselves are living entities that can think independently, and the synchronized parasites will completely control the human brain.Because of Jung Soo In's original serious injury, the larvae were forced to heal her body first without fully occupying her brain for synchronization.Therefore, the parasitic beast can only control Jung Soo-in when she is in danger to protect the common body.

However, the parasite in Zheng Xiuren's body could only maintain its will for fifteen minutes.Therefore, the monster intends to protect this body and maintain life for this limited time.Choi Joon Kyung said the way to identify monsters is to pull out their hair.As long as it is separated from the host, its hair will quickly dry up, which means it is a monster.And Cui Junjing's monster husband is her pride.The helmet on his head sprays the parasite's most disgusting chemicals, making the parasite unable to react and only feeling pain.The reason for keeping this monster alive is to find the existence of other monsters through the unique brain waves among monsters.Therefore, Choi Joon Kyung’s monster husband is like a “hound” radar.Zheng Xiuren was warned by the monster inside her body that once her kind discovers that she is a mutant, she will definitely be eliminated.