In Tokyo, sixteen-year-old Nao has decided there's only one escape from her aching loneliness and her classmates' bullying, but before she ends it all, Nao plans to document the life of her great-grandmother, a Buddhist nun who's lived more than a century. A diary is Nao's only solace—and will touch lives in a ways she can scarcely imagine. In the wake of the 2011 tsunami, Ruth discovers a…