Mordecai finds out about the plot. he tore his clothes, put on sackcloth and ashes, and went out into the city, wailing loudly and bitterly. But he went only as far as the king's gate, because no one clothed in sackcloth was allowed to enter it. In every province to which the edict and order of the king came, there was great mourning among the Jews, with fasting, weeping and wailing. Many lay in sackcloth and ashes.
When Esther's maids and eunuchs came and told her about Mordecai, she was in great distress. She sent clothes for him to put on instead of his sackcloth, but he would not accept them. Then Esther summoned Hathach, one of the king's eunuchs assigned to attend her, and ordered him to find out what was troubling Mordecai and why. So Hathach went out to Mordecai in the open square of the city in front of the king's gate. Mordecai told him everything that had happened to him, including the exact amount of money Haman had promised to pay into the royal treasury for the destruction of the Jews. He also gave him a copy of the text of the edict for their annihilation, which had been published in Susa, to show to Esther and explain it to her, and he told him to urge her to go into the king's presence to beg for mercy and plead with him for her people. You can imagine her reaction. After a it of persuasion though, she agrees to do it. Then Esther sent this reply to Mordecai: "Go, gather together all the Jews who are in Susa, and fast for me. Do not eat or drink for three days, night or day. I and my maids will fast as you do. When this is done, I will go to the king, even though it is against the law. And if I perish, I perish."
So Mordecai went away and carried out all of Esther's instructions. That would be really scary, knowing that queen Vashti was sent away because she didn't do what shewas told, not that she disobeyed the rule. Esther's gonna disobey.