THE WATER MAN follows a family facing hardships. Gunner is a very bright young man, who loves to read and do research. When his mother, Mary, gets sick, he longs to help and learn more about her disease. When Gunner finds out about a man with eternal life, he believes the man can help his mother. Gunner and his father, Amos, are not seeing eye-to-eye and can’t seem to get along, which may have to do with his mother’s illness. A troubled girl named Jo tells Gunner about a man who has eternal life. With her help, Gunner runs away into the mountains to find the Water Man.