Little Pepper has a close bond with his father. Pepper does not grow properly and is henceforth called “little boy”.
After the outbreak of the Second World War, his father is called up because his older brother is not fit for service. Pepper is inspired by the Bible verse “For verily I say unto you, If ye have faith as a grain of mustard seed, ye shall say unto this mountain, Remove hence; and it shall remove; and nothing shall be impossible unto you.” (Mt 17:20) and he works to avoid falling prey to the general hatred of Americans towards the Japanese. He befriends Hashimoto, which helps him to cope better with his problems. Pepper's father is killed in the war and Hashimoto accompanies him to the funeral to pay his respects. They discuss the importance of family and faith. When they receive the news that his father has not died after all. There has been a mix-up. In the end, Pepper manages to end his father's amnesia through shared memories. The story ends with the message that anything is possible through strong faith.