Sweet, sometimes-sad story about two sisters named Sadie and Zuzu who move to Salt Lake City, Utah with their dad and not-wicked stepmother (their mom died when Zuzu was born). The girls discover a journal in the attic, written by a girl named Helen who lived in the house during the influenza epidemic of 1918. As they get more involved in Helen's story, Sadie, Zuzu, and their new friend Bella try to figure out what happened to her and her family.