As a child, Clementine Monroe had an imaginary friend. Year after year, whenever she visited her grandparents' cabin in South Dakota, she and Wihanbla would meet and spend time learning about each other's worlds - hers in the twenty-first century, his on the cusp of the infamous battles that would eventually lead to the internment of his people on reservations.Now grown, Clementine and her friend continue to meet, though her family has decided that...