The Chandaria family--emigrants from the Indian-enclave of Nairobi--have managed to flourish in America. Premchand, the father, is a doctor who has worked doggedly to grow his practice and give his family security; his wife, Urmila, runs a business importing artisanal Kenyan crafts; and their son, Sunil, after quitting the pre-med track, is enrolled in a PhD program in philosophy at Harvard. But the parents have kept a very important secret from Sunil:...