Eugene, a young teenage Jewish boy, recalls his memoirs of his time as an adolescent youth. He lives with his parents, his aunt, two cousins, and his brother, Stanley, whom he looks up to and admires. He goes through the hardships of puberty, sexual fantasy, and living the life of a poor boy in a crowded house.

Eugene, an aspiring writer from Brooklyn, is drafted into the US Army during the final months of World War II. For his basic training, the Army sends him to Camp Shelby in Mississippi, where toil, bad food, and antisemitic jibes await. Eugene takes refuge in his sense of humor and in his diary, but they won't protect him in a battle of wills with an unstable drill sergeant.

Eugene and Stanley Jerome try to break into show biz as comedy writers while their parents' marriage ends.