The story takes place in a small coastal town in the United States during World War II. The eight-year-old boy Pepper (Jakob Salvati) was born short and thin, and was bullied by his peers for this. He was nicknamed "little boy". His best friend and partner is his tall and burly father James (Michael Rapaport). With the guidance of his father, Pepper spent a good time. Until his father was called up to the army and put into the battlefield of World War II. Just when Pepper was looking forward to his father's return home, the bad news came that his father was captured as a prisoner of war by the Japanese army in the Philippines, and his life and death were unknown. At the same time, Pepper and his brother London (David Henrie) vented their hatred of war on a Japanese bridge in the town, and both brothers received corresponding punishments for this. In order to educate Pepper, the priest gave him an "ancient list". As long as he completed all the tasks on the list, he would have the faith and strength to move the mountains, so that he could bring his father back from the battlefield of World War II. One of the items on this list is to become friends with the Japanese Hashimoto...