Marly and her family are moving out to the country, back to her mother's grandmother's house, back to where she would say: "Now scoot, you two, for goodness' sakes! Up here, there's all outdoors!"
Moving so her father can start recovering from his time spent as a prisoner of war, as Marly and her family learn about the country life from their neighbors Mr. and Mrs. Chris, they do start adjusting and becoming happier. When Mr. Chris suffers a heart attack during "sugaring time," Marly's family helps to repay the kindness shown them by pitching in to keep the fires going, keep the sap moving, and bring in that year's harvest of maple syrup...even getting the whole school to join in their efforts.
Miracles on Maple Hill won the 1957 Newbery Medal.