New York, 1908: The days are getting longer—and warmer—in Manhattan. Molly Murphy Sullivan doesn’t want to leave her home in the city, but typhoid is back, and she’s expecting. So she heads north with the children to summer with her mother-in-law in Westchester County. Though her mother-in-law is an excellent host, Molly quickly grows bored. And when her friends Sid and Gus invite her to visit, Molly jumps at the chance to stay with them at...