What is the main conflict in Stotan! by Chris Crutcher?

Each of the boys faces challenges outside the pool. Walker is dating a girl named Devnee in whom he has lost interest but cannot bring himself to address. At the same time, he is attracted to another friend named Elaine who has started seeing someone else. Lion is an orphan who lives on his own and was once expelled from school. Nortie lives with an abusive father and carries guilt over the suicide of his older brother. Jeff is diagnosed with leukemia during the swim season and his health fails rapidly.