Zacchaeus was a short and wealthy tax collector. He heard Jesus was coming to town, and wanted to see Jesus.
So Zacchaeus climbed a sycamore-fig tree. There was a big crowd so he was unable to see until he climbed the tree. Once he had done this, Jesus stopped and looked up to him, and said come down from the tree, so he could go to his house.
Zacchaeus came down after Jesus said this and welcomed him into his house. The crowd was annoyed that Jesus was going to a house of the sinner. Zacchaeus told Jesus he would pay back anyone he owes and will give back even more. Jesus told the crowd the man was saved, and that he himself came to seek and to save the lost.