When Frannie Little eavesdrops on her parents fighting she discovers that her cousin Truman is gay, and his parents are so upset they are sending him to live with her family for the summer. At least, that's what she thinks the story is. . . When he arrives, shy Frannie befriends this older boy, who is everything that she's not-rich, confident, cynical, sophisticated. Together, they embark on a magical summer marked by slowly unraveling secrets.