As the 1950s' Mau Mau war breaks out in the foothills of Mt. Kenya, Wambũi, a 14-year-old girl, leaves her besieged village to join a prestigious boarding school, a half day’s journey away by train. There, she becomes aware of her extraordinary mathematical abilities discovered by her teacher Eileen Atwood.

Initially, Wambũi views Eileen’s attentions with suspicion and hostility, but over time, the two grow close and form a lifelong friendship. Unfortunately for Wambũi, the mid-20th century isn’t ready for a female math prodigy, particularly in Kenya. But she quietly and defiantly takes on the obstacles seeking to define her, applying her unusual gifts in new directions, which ultimately benefits her impoverished family and inspires her siblings and their children to pursue their own dreams.

After 40 years in Kenya, Eileen unexpectedly loses her employment authorization and is forced to return to England, where she struggles to adjust to living in a country she barely recognizes. Meanwhile, Wambũi’s son Ray, a doctor, navigates a fraught visa application process and travels to America to begin residency training; however, his hospital becomes insolvent and shuts down a year later.

He and his colleagues are assimilated into other programs where, as foreign-born physicians, they endure relentless prejudice. As a Black man, he also discovers that the streets of Chicago are sometimes quick to judge, with serious consequences.

A saga of family and friendship spanning five decades and three continents, The People of Ostrich Mountain chronicles the interconnected lives of three outsiders as they navigate the vagaries of race, gender, and immigration.