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.
Poppy, her rebellious son, Junior, and his friends Melphitis and Ereth, are summoned back to Gray House, to help save her family home from the destruction of the bulldozer.