Bigthana and Teresh were two of the king's officers. They guarded the door of the royal palace. They became angry with King Xerxes. So they decided to kill him. They made their evil plans while Mordecai was sitting at the palace gate.
So he found out about it. And he told Queen Esther. Then she reported it to the king. She told him that Mordecai had uncovered the plans against him.
Some people checked Esther's report. And they found out it was true. So the two officials were put to death. Then poles were stuck through them. They were set up where people could see them. All of that was written in the official records. It was written down while the king was watching.