The Farmer's Secret Power

During a famine, Bill Wyatt of Hillside Village is abandoned by his fiancée; her family cripples his father. He unlocks the Size-Shifting System to shrink/enlarge creatures. Bill hunts beasts, raises fish/poultry, trading for grain. Village Chief Tiberius Thorne embezzles grain and suppresses Bill. Bill saves teacher Wanda Sullivan; they develop feelings. Bill exposes Thorne's crimes. He guides village through famine, cures father, and gets engaged to Wanda, becoming village leader.