In the novel, The Water Keeper, Murphy, a man living alone on an island devoted to rescuing those in need, rescues a woman named Summer who is searching for her missing daughter, Angel. As they tend to her wounds after a boating accident, Murphy learns of Angel's dire situation. Despite initial feelings of predictability, the story takes a turn as Murphy's quest to rescue Angel becomes a journey of self-discovery and faith. Along the way, he forms relationships with other characters, like Casey, who he has rescued before. Ultimately, Murphy's compassion and determination lead him to not only rescue Angel, but also to turn her life around and gain the trust of those he encounters on his mission.