"Travel light and you can sing in the robber's face" was the best advice Summer Zwolenick ever received from her father, though she didn't recognize it at the time. Three years after the accident that ended her career as a ballerina, she is back in the familiar suburbs of Dayton, Ohio, teaching at a local high school. But it wasn't nostalgia that called Summer home. It was her need to spend quality time with her brother, Todd, and his devoted partner,...