Macbeth Arranges the Murder
Your first glimpse shows Macbeth giving final instructions to the murderers he's hired to kill Banquo and Fleance. He's being incredibly specific about timing - it must happen tonight and away from the palace so he can maintain his innocence.
Notice how methodical Macbeth has become. He mentions "the perfect spy o' th' time" - essentially the perfect moment to strike. This shows he's no longer the hesitant character who needed Lady Macbeth's persuasion to kill Duncan.
The scene ends ominously with Macbeth's line: "Banquo, thy soul's flight, if it find heaven, must find it out tonight." This reveals both his determination and his awareness that what he's doing is evil.
Key Point: Macbeth is now making murderous decisions independently, showing how ambition and paranoia have completely transformed his character.
