Haman plans to kill Mordecai
Haman was angry with Mordecai. His wife and friends told him to set up a gallows and have Mordecai hanged on it the next day.
Key passages
Es 5:9–14

And Haman went out on that day rejoicing and feeling good. But when Haman saw Mordecai at the gate of the king, and he did not rise or tremble before him, Haman was filled with rage toward Mordecai. But Haman controlled himself and went to his house, and he sent for and brought his friends …

See also
Important Things