Lady Macbeth has drugged the guards.
She waits nervously for Macbeth.
She prepared daggers for Macbeth.
Macbeth appears disturbed and regrets the murder.
He hears the King's sons praying.
Macbeth cannot say 'Amen' and feels damned.
Lady Macbeth tells him not to dwell on it.
She orders him to plant the daggers on the guards.
Macbeth panics and cannot go back.
Lady Macbeth mocks his fears and insists they leave.