One Hen tells the story of Kojo, who lives in an Ashanti village in Ghana and turns a small loan into a thriving farm. After his father died, Kojo left school to help his mother collect firewood to sell. When his mother receives a loan from some village families, she gives a little money to her son. with this tiny loan, Kojo buys a hen. A year later, Kojo has built up a flock of 25 hens. with his earnings Kojo is able to return to school. Kojo's story is inspired by the life of Kwabena Darko, who as a boy started a tiny poultry farm just like Kojo's, which later grew to be the largest in Ghana. The final pages of one Hen explain the microloan system.