Macbeth vows to go down swinging—if he has to go down at all.
Characters: 
Macbeth

Macbeth, after realizing that his wife is dead, resolves to fight Malcolm’s army to the death.

Seyton

Macbeth's personal servant.

Messenger

A messenger who reports a sight that cannot quite be believed: that the forest outside the castle appears to be moving.

Soldiers

The few Scottish soldiers still loyal to Macbeth.

Scene Summary: 

Back at Dunsinane, Macbeth is getting a little overconfident. Dunsinane is well fortified, and he thinks he can wait out any attempt at a siege. The feeling is short-lived, though. He finds out that his wife has died, and that Birnam Wood is, in fact, marching to Dunsinane. Or, at least, thousands of soldiers carrying tree branches are. Macbeth vows to fight to the death.