Plot of the game Parasite takes place in the modern world. The story centers on an ordinary citizen named Simon Brown. He is an employee of a large corporation that produces medicines and other pharmaceutical products. And, of course, they conduct not entirely legal experiments on animals. The character sometimes has a hard time getting home, because activists are periodically waiting for him. They are against animal abuse. The only catch is that the doctor has nothing to do with this at all. After all, he is responsible for a department that specializes in the study of parasitic organisms.

One day, the main character of Parasite wakes up in a room, on an operating table. At the same time, he does not remember anything, and does not recall. The problems are added by the fact that the rest of the staff simply evaporated. There is not a living soul in the laboratory. Now his main task is to regain his memory, to restore the chain of events. The user controls his protégé. First of all, it is necessary to explore all the premises of the medical center. After all, in the rooms, offices, there will be clues and hints. For example, diaries of researchers, medical journals. The fact that a disaster has occurred is indicated by the lack of electricity. Therefore, you should use the found flashlight. By the way, there will be a pistol, and cartridges for it. After all, along the way, you will come across infected creatures. For example, brutal dogs. You should shoot back in an economical mode, ammunition tends to end. You will also have to solve problems and puzzles. This is what will lead to the solution of the incident.