Americanah is about Ifemelu and Obinze who, as teenagers in a Lagos secondary school, fall in love. Nigeria at the time is under military dictatorship, and people are seeking to leave the country. Ifemelu moves to the United States to study, where she struggles for the first time with racism and the many varieties of racial distinctions: for the first time, Ifemelu discovers what it means to be a "Black Person".[2] Obinze had hoped to join her in the U.S. but he is denied a visa after 9/11. He goes to London, eventually becoming an undocumented immigrant after his visa expires.[3][4]
Years later, Obinze returns to Nigeria and becomes a wealthy man as a property developer in the newly democratic country. Ifemelu gains success in the United States, where she becomes known for her blog about race in America, entitled "Raceteenth or Various Observations About American Blacks (Those Formerly Known as Negroes) by a Non-American Black".[4] When Ifemelu returns to Nigeria, the two consider reviving a relationship in light of their diverging experiences and identities during their many years apart.