Horton hears a strange noise coming from a speck of dust, and decides there must be someone on it. He rescues the speck and places it on a clover ("Horton Hears a Who") and decides to guard it. Led by the at-first-villain Sour Kangaroo, the other animals in the jungle mock him mercilessly, except for Gertude McFuzz, Horton's next door neighbor, who admires his compassion and begins to fall in love with him ("Biggest Blame Fool"). Horton soon discovers the dust speck is in fact a planet covered with microscopic people called Whos. They introduce themselves and their community (such as their yearly Christmas pageant based on How the Grinch Stole Christmas) and explain their predicament. In addition to being unable to control where their dust speck flies, they are on the brink of war and all