Horton discovers a hidden community of intelligent Whos living on a tiny plant, audible only to him. Moved by their plight, he vows to protect them from harm. But the other animals think Horton has lost his mind, and they concoct a plan to "save" him from his delusions.

Horton Hears a Who!
Horton, a compassionate elephant, safeguards a minuscule community of beings dwelling on a speck of dust, defying the skepticism of those around him.