Luke 3

Zacharias' son, John, conducts his ministry in the desert region around the Jordan River.  His message is to repent and show the fruits of repentence in one's life.  He makes specific personal applications to various groups of people that come to be baptized - i.e.  identify that they have repented in the way he is prescribing.  Jesus is One Who comes for baptism, and God Himself speaks words of approval at the occasion.  Luke then traces Jesus' genealogy on His mother's side - all the way back to Adam and God.