"The Rats of NIMH" is a children's novel written by Robert C. O'Brien that tells the story of a field mouse named Mrs. Frisby. She seeks help from a group of genetically modified rats living in a nearby rosebush after her home is threatened by a plow. The rats, known for their intelligence and advanced technology, have escaped from a laboratory called NIMH. The story explores themes of courage, sacrifice, and the struggle for survival. As Mrs. Frisby learns more about the rats' past and their efforts to create a better life, she must decide how to protect her family while navigating the challenges posed by both humans and nature.