Ragweed, a young country mouse, leaves his family and travels to the big city, where he finds excitement and danger and sees cats for the first time.

When their home next to a brook is destroyed by beavers, a large family of golden mice is aided by Poppy the deer mouse and her grumpy porcupine friend, who in the process forges a relationship with the son he had abandoned.

Poppy, accompanied by her troublesome son Junior, his skunk friend, and Uncle Ereth the porcupine, responds to a summons to return to her ancestral home, Gray House, to save the mice there from destruction by a bulldozer.

The first new book about Poppy in more than ten years, from Newbery Medal-winning author Avi with illustrations throughout by Caldecott Medal-winning artist Brian Floca. How did Ragweed and Poppy meet and become friends? This book tells their hilarious story! Adventurous golden mouse Ragweed is on a freight train leaving the city of Amperville. On his journey he meets Lotar, a young, annoying, and lost raccoon who's desperate to reunite with his mother....