At the end of Act I, Lady Macbeth and Macbeth, are about to commit a crime. Lady Macbeth was angry with Duncan, and was in the process of plotting to kill him. She kept telling Macbeth that they were not going to fail. Lady Macbeth plans to kill Duncan and then place the blame on two chamberlains. Lady Macbeth’s plan is to get the guards drunk, and then Macbeth will stab Duncan while he is unarmed. Then they would smear Duncan’s blood all over the guards. Macbeth knew not to listen to his wife, but he did anyway and went along with the plan.
The opening scene in Act II, scene 2, is of the murder that is about to take place. The guards are drunk, and Duncan is sound a