What's a NIMH? It's a place. The Letters stand for "National Institute of Mental Health." In this exciting cartoon fantasy, some rats escape from the lab at NIMH. Experiments there turned them into metal whizzes who can read, write, and build their own magic kingdom. But are they smart enough to save themselves from exterminators sent out by NIMH? Can they rescue a lady rat named Mrs. Brisby, a widow with four kid rats, from being plowed under? There are chills, thrills, and laughs - plus some unforgettable characters like Jeremy, a klutzy crow looking for Miss. Right; and Dragon, a farm cat who tries to live up to his name.