The Secret of Nimh | 1982
Mrs. Brisby is a widowed, mother field mouse, who bravely tries to save her family's home from being destroyed by a farmer's plow. After attempting this on her own, she realizes that she needs the help of the rats who live under a nearby rosebush and came from NIMH, the National Institute of Mental Health. The rats have ways that seem strange to Mrs. Brisby, but they are intelligent, and are the only ones who can help her. And when Mrs. Brisby learns the secret of NIMH, her life could be completely changed.