This scene began with Banquo giving a soliloquy about how all the predictions the witches made about Macbeth were true and clarifying to the audience that Macbeth has been crowned king. Later Macbeth fragile state of mind is causing him to believe that Banquo is untrustworthy because he was there when the witches told him his future and could possibly figure out that he killed Duncan. Banquo was also told that his sons will be kings, making him a threat to Macbeth as stated in the play “Our fears in Banquo stick deep; and in his royalty of nature reigns that which will be fear’d”. Macbeth then goes and hirers some murderers to kill Banquo and his son. I believe that this is the beginning of the end for Macbeth; somehow Fleance will survive and then seek out revenge by killing Macbeth for killing his father and then claiming the thrown making him and his sons after him kings.