In A Separate Peace, Gene Forrester reflects back on his life at the Devon School in New England, 15 years in retrospect. He shares memories about the jumping tree by the Devon River. Gene is set apart as the introvert while Finny is outgoing. He and Finny jump off of the tree together while others are too scared. Jumping becomes a nightly occurrence with the formation of 5S. Gene becomes stressed that 5S is taking him away from his studies, so he causes Finny to fall from the jumping tree.
Finny is away for the rest of the summer and part of fall and Gene can concentrate on school. Gene visits Finny once at Finny’s house to tell him that he caused the accident, but Finny refuses to listen. Once Finny returns, he says he’s going to train Gene for the ’44 Olympics as it was a dream for him. Later that winter, Finny sets up the Winter Carnival. At the carnival, Gene gets a telegram from Leper to see him. Leper said he’d “escaped” from the army after having enlisted earlier in the year. When Gene sees Leper at his Vermont home, Leper seems irrational and “psycho.” He talks about seeing objects as human body parts or putting a woman’s face on a man’s body.
After Gene returns, he spends time with Finny until Brinker and some other boys come get them late in the night. They take Finny and Gene to the Assembly Room in the First Building. They have an “inquiry” into Finny’s accident and after Leper’s testimony, Finny comes to the realization that Gene caused his accident. Finny rushes out of the room and falls down the marble staircase. He later dies during the operation to set his leg when marrow in his bloodstream stops his heart. Gene doesn’t mourn over Finny and realizes that he’s the one who killed Finny, his enemy.