The Secret of NIMH

Mrs. Brisby's son, Timmy, falls seriously ill with pneumonia. This dire situation puts immense pressure on the family, complicating their impending need to move to a safer home.

An unexpected warm spell leads Farmer Fitzgibbons to plow his fields sooner than usual. This sudden action places Mrs. Brisby and her children's fragile home in grave danger of destruction.

In desperation, Mrs. Brisby consults her neighbor, Auntie Shrew, for advice on how to protect her family. Auntie encourages her to face her fears and seek the Great Owl for guidance.

With trepidation, Mrs. Brisby meets Jeremy, a clumsy but well-meaning crow who promises to help her. His assistance becomes crucial as she embarks on her journey to find the Great Owl.

Mrs. Brisby meets the Great Owl, who reveals crucial information about her late husband. He advises her to seek the help of the Rats of NIMH, leading her to the thorny rosebush.

Upon finding the Rats of NIMH, Mrs. Brisby discovers a community powered by stolen electricity. This surprising society reveals their extraordinary past and their deep gratitude to her husband, Jonathan.

Dr. Ages, the family doctor, recognizes Mrs. Brisby's determination and the significance of her meeting with the Great Owl. He confirms the formidable challenge she now faces.

Within the Rats of NIMH, Mrs. Brisby encounters Jenner, a rat with ambitions to take control from Nicodemus. His manipulative intentions threaten the unity and plans of the rats.

Mrs. Brisby offers to sedate the farmer's vicious cat, Dragon, to secure her family's safety. However, during the operation, she becomes trapped, overhearing a malicious plot by Jenner.

As tensions rise, Jenner's treachery culminates in a heartbreaking confrontation that results in Nicodemus's death. The stakes escalate, putting Mrs. Brisby's mission and her children's safety in jeopardy.

Fueled by a mother's love and the amulet given to her by Nicodemus, Mrs. Brisby summons her courage. With unwavering determination, she lifts her home just in time to save it from destruction.

After the tumultuous night, a new day arrives with hope. Timmy starts to recover from his illness, and a sense of relief washes over the Brisby family as they assess their future.

With the rats abandoned, NIMH begins to investigate the rosebush where the rats lived. This scrutiny indicates that the dangers faced may not be over yet for Mrs. Brisby and her family.

As Jeremy returns with new resolve and ambitions, he discovers the Brisby home miraculously relocated. The natural surroundings beautify their new home, hinting at fresh beginnings.

The Brisby children nurse their mother's wound from using the amulet, marking the beginning of healing. Meanwhile, Jeremy's arrival with a companion brings unexpected joy and a hint of new relationships.