What was Lady Macbeth's murder plan?

He and Lady Macbeth plan to get Duncan’s two chamberlains drunk so they will black out; the next morning they will blame the murder on the chamberlains, who will be defenseless, as they will remember nothing. While Duncan is asleep, Macbeth stabs him, despite his doubts and a number of supernatural portents, including a vision of a bloody dagger. When Duncan’s death is discovered the next morning, Macbeth kills the chamberlains—ostensibly out of rage at their crime—and easily assumes the kingship. Duncan’s sons Malcolm and Donalbain flee to England and Ireland, respectively, fearing that whoever killed Duncan desires their demise as well.