In Forres, Banquo ponders the meaning of Macbeth’s coronation and with the rest of the witches’ prophecy. He suspects that Macbeth won the throne through nefarious means but is intrigued that his own children might one day be crowned King of Scotland. Macbeth and his wife enter as King and Queen. They invite Banquo to a feast and he accepts, though he plans to go riding in the afternoon first. Macbeth hopes to talk to Banquo about Duncan’s sons, who might be plotting after fleeing the country. Banquo departs, mentioning that his son Fleance will accompany him on his ride.

A group of men has arrived to talk to Macbeth. While they make their way to Macbeth’s chamber, Macbeth has a moment alone to reflect on Banquo, who he fears is a daring and brave opponent. Macbeth worries about the witches’ prophecy; if they were correct about Macbeth taking the crown, then they may be correct about Banquo’s sons inheriting it. Will Macbeth not produce an heir? Has Macbeth set up Banquo’s sons to do the same to him that he did to Duncan? Did Macbeth damn his soul for the benefit of Banquo’s sons?

The servant returns with men described in the stage directions as murderers.