Dawn Rochelle has just turned fourteen, and her cancer has been in remission for almost a year. This summer, as she helps prepare for her brother's wedding and goes to camp, her life seems almost normal again.
 
But when Dawn returns home from camp, she's suddenly tired all the time. Her latest tests show that the worst has happened: Her leukemia is no longer in remission. Dawn must receive a bone marrow transplant from her brother. Even then she has only a fifty percent chance of survival. Will Dawn live to celebrate her fifteenth birthday?