The answer to that question is, your new son-in-law's parents. A wealthy white family is informed that their daughter's intended is coming to meet them, and he's black. Scripted in the late 60s, the idea of a bi-racial marriage was still fairly shocking. To smooth this over, the son-in-law to be is a prince. He's a Doctor who lives in Switzerland and intends to take their daughter there to live. Set in California, it's not quite a return to Selma, Alabama, but was controversial in its day.