Capitalizing on the success of its hit series "Sister Wives," TLC focuses on the journeys of three unique families in various phases of polygamous relationships. Cameras capture the intimate process of men seeking, dating or incorporating a new wife into their family structure and the myriad triumphs, frustrations and heartaches associated with the emotional changes. Of course, with multiple husbands, wives and 20-plus children residing between the households, drama-filled days are inevitable. But these families are determined to open their hearts and homes to new wives, even if a few growing pains are felt along the way.