Terrified that the death of the grandmother who was their guardian will separate them, twelve-year-old Mark decides to run away with his retarded younger brother.
Recounts the successes and failures of the year Lynch and her retarded sister, Mary Fran, lived together as part of a project designed to encourage Mary Fran to develop the skills necessary for a normal, independent life.
A fifteen-year-old's letters to the one person she really cares about reflect her increasing inability to cope with the situation surrounding her special learning problems.