The world is in need of help. Unfortunately there is no one to turn to. Everywhere, everyone is suffering. Nowhere is safe. No one can escape this.

It all started with one cure. This was the Ultra Serum. A group of scientists working in a secure location created this for the benefit of others. They thought they had cracked the solution to illness. Many years had been spent trying to find a cure for all illnesses. At first the cure could only prevent one illness. They weren't satisfied with there efforts and wanted more. They put chemicals, illnesses, everything into trying to perfect the serum. Every change made to the cure would be carried out on a test subject. Every subject was only supervised for a limited amount of time, sometimes only a day. After the supervision the subjects were sent back to wherever they came from. Each subject seemed to act and react differently. The first to be tested had no change in their behaviour, but their illness was gone. Each subject in order of testing would react less like themselves than before the serum. This made the scientists worry and cautious. This caused the scientists to be quiet and all further subjects to be kept in the same building. Occasionally someone would visit and watch the subjects. Whenever the subjects saw someone who had not taken the serum they detected this and would go into a frenzy. Eventually it developed further. The subjects would fight with each other, being more agitated. Everyday they caused carnage, this caused the injuries they had obtained would be critical but they would feel no pain. When the scientists saw this they thought there was simply a mistake in the serum. After this the subjects mutated and became lifeless, damaged monstrosities.

They would crave the flesh of the humans who had not taken any of the serum. No one knew what they were. One day they finally escaped. Eating and contaminating all in its path. There's hardly any humanity left. No one knows how to stop them.