Every day, Lord Tennyson the Miniature Schnauzer does his very best to care for the six McNiff children and keep them from destroying their pink New England farmhouse--and the rest of the town for that matter. But when summer vacation brings the kids home together all day, his chaos-containing skills are put to the ultimate test.

Baby Sweetums is still refusing to walk, nap, or listen to anyone; Ezra is trying to keep a snake as a secret pet; Annie and Mary's fighting is worse than ever; and Pearl and Tate are scared of just about everything. And when a particularly tempting trio of baby chicks arrives at the house, even Lord Tennyson finds he can't stay on his best behavior.

As the chaos begin to spiral out of hand, though, something truly awful happens: Mr. and Mrs. McNiff seem to be considering getting "a real nanny" to care for their big brood! Can Lord Tennyson get the McNiffs' hijinks under control and teach them to behave before the summer's out? Or will this most unusual nanny find himself out of a job and back in the doghouse?