Flora, Ruby, Olivia, and Nikki are sad that the Willets have moved out of the Row Houses -- but they're excited when they hear the new neighbors will have kids nearly their age. One of them, Willow, seems like a natural fit for their group of friends. The only problem? Willow doesn't seem eager to be a part of life on Main Street. Eventually, Flora discovers that Willow has a secret -- a secret tied to the often erratic behavior of her mother. What's a good neighbor -- and a new friend -- to do?