The Littles are a family of tiny people who live in the Bigg family's house. Mr. Little is only six inches tall, and he is big for a Little. The Littles develop a plan to get rid of the mice in the Bigg's house.
Grandpa Little disappeared many years ago. Everyone says he is probably dead...except Granny Little. But when Tom and Lucy, the littlest Littles of all, find a secret room filled with papers belonging to Grandpa Little, they think that maybe he's alive after all. If the Littles read his diary and study his maps, can they find Grandpa Little or will he be lost forever?
The Littles don't visit the other tiny people of the Big Valley often. It's too dangerous to leave their homes. There are mean weasels and rushing rivers! But when Cousin Dinky arrives with news from all over the valley, the Littles decide that it's finally time to go visit their friends. It's a historic event that kicks off the First Annual Meeting of the Tiny People of the Big Valley!
Tom, Lucy, and Mr. Little must get to Trash City to deliver a message to their friends, the Trash Tinies. But there is a terrible storm! Will the Littles get to the city below the garbage dump? And what will they find when they get there?