As the school year ends, Charlie is anxious about losing his older friends—especially Sam, who is leaving for a summer college-preparatory program and has learned that her boyfriend cheated on her. When Charlie helps her pack, they talk about his feelings for her; she is angry that he never acted on them. They begin to engage sexually, but Charlie suddenly grows inexplicably uncomfortable and stops Sam. Charlie begins to realize that his sexual contact with Sam has stirred up repressed memories of him being molested by his Aunt Helen as a little boy. Charlie shows signs of PTSD from the incident and the revelation of his abuse helps the reader understand his views of relationships and love.