There's a madwoman upstairs, and only Megan Weiler can see her. Ravaged and sore from giving birth to her first child, Megan is mostly raising her newborn alone while her husband travels for work. Physically exhausted and mentally drained, she's also wracked with guilt over her unfinished dissertation--a thesis on mid-century children's literature. Enter a new upstairs neighbor: the ghost of quixotic children's book writer Margaret Wise Brown, author of the beloved classic Goodnight Moon, whose existence no one else will acknowledge.