Secret of NIMH1982

Nicodemus:
In the beginning, we were ordinary street rats, stealing our daily bread, and living off the efforts of man's work. We were captured, put in cages, and sent to a place called NIMH. There were other animals there, in cages. They were put through the most unspeakable torture, to satisfy some scientific curiosity. Often, at night, I would hear them cry out in anguish. Twenty rats and eleven mice were given injections. Our world began changing.