I have found 3 summaries for you to look at, click the link below. I have included a short extract to give you a taste of what the reviews have to offer.

http://www.cliffsnotes.com/WileyCDA/LitNote/id-63.html

http://www.sparknotes.com/lit/lessonbefore/

http://www.pinkmonkey.com/booknotes/monkeynotes/pmLessonBeforeDying01.asp

Plot Overview

Grant Wiggins has been teaching on a plantation outside Bayonne, Louisiana, for several years when a slow-witted man named Jefferson is convicted of murder and sentenced to death. Jefferson claims he is innocent of the crime. More……

http://www.sparknotes.com/lit/lessonbefore/summary.html

Good luck.