Jenny, the new girl, gets a part in the play that Jessica wanted to get. Jessica is very angry, and wants to hurt Jenny but learns from the play that with God's help you must forgive and not hold grudges or judge others. If you do, you will not be very happy.
When Jessica forgives and lets go of the grudges, she makes a new friend and all is well. This great book teaches children the importance of forgiving and not judging or holding grudges.