'Scheme' in the Bible

Then Esther spoke again to the king and fell down at his feet and wept and implored him to avert the evil plot of Haman the Agagite and his plan which he had devised against the Jews [because the decree to annihilate the Jews was still in effect].

But when it came before the king, he commanded in writing that Haman’s wicked scheme which he had devised against the Jews was to return on his own head, and that he and his sons should [endure what he planned for the Jews and] be hanged on the gallows.

Why are the nations in an uproar [in turmoil against God],And why do the people devise a vain and hopeless plot?