Margaret is a mean, cranky human toddler from a family of nine. She is such a pain that her beleaguered parents chuck her out, and she's on her own, grousing and grumping until two caring woodchucks, Phoebe and Fred, take Margaret in as their own. But despite their love, Margaret continues to wreak havoc with her loud, destructive ways, ruining the burrow and shrieking nonstop. Soon the woodchucks are as beleaguered as Margaret's human parents were, but because love is more powerful than temper tantrums, they are determined to make it work. So they enlist a little unconventional help, and with the guidance of a snake, bats, and a skunk, their feral little human just might realize there's more to life than being mean.