The boy and the girl, college students, are seated in the campus hangout, holding hands, deep in conversation. The girl confides that she will spend the weekend with her biology professor; it is, alas, the price she must pay for a passing grade in biology. Same old soap opera, same old dilemma, and as with all such troubles, matters will eventually straighten out and soon worse crises will occur.
Yet there is something different going on here. The boy, Adam Marshall, is black; the girl, "Sam" Whitmore, is white. The Whitmore and Marshall families have been close for three generations, their...