Sunny Hathaway--introvert, entrepreneur, inventor, poet, dog lover, and lateral thinker--has a lot on her plate. She's moving to a new house, dealing with step-siblings, and starting a dog entertainment business too. Sunny and her expertly blended, thoroughly modern family are moving into her grandmother's old mansion, Windermere. Sunny wins the turret bedroom from her step-siblings (using her powers of reverse psychology), but is soon tangled up in mischief involving bored dogs, a cranky old gardener, an angel sighting, a match-making mission, and a boy who knits. To make matters worse, over at her dad's house, Sunny's baby half-sister Flora has turned the world upside-down, and Steph can't seem to find a way to turn it right-side-up again. Even with a sunny disposition, storm clouds can gather on the horizon, and this winter Sunny must find ways to offer warmth and shelter to those she cares for most.