So art thou to revenge. I am thy father's spirit Doomed to walk the night till the foul crimes done in my days of nature are burnt and purged away. Revenge his foul and most unnatural murder. The serpent that did sting thy father's life now wears the crown.
So, uncle, there you are. Now to my word: it is adieu adieu. Remember me.
The ghost of King Hamlet reveals to Prince Hamlet Claudius is responsible for his murder. Prince Hamlet responds by vowing to avenge his fathers death by killing Claudius.
Ghost of King Hamlet
Polonius tells the King and Queen that he believes Hamlet is acting strange because he is mad. Polonius believes Prince Hamlet is mad because he is in love with Ophelia and she rejected him. In reality Hamlet is acting strange because he learned the truth about Claudius.
Hamlet, he's mad, 'tis true 'tis pity. Mad let us grant him, then, and now remains that we find out the cause of this effect.
While explaining to Gertrude why he is acting strange, Hamlet sees someone hiding in the room. Hamlet thinks it's Claudius so he kills him. After he is dead Hamlet realizes it was actually Polonius he had killed.
Hamlet calls for drink, I'll have prepared him a Chalice for the nonce, whereon but sipping, if he by chance escapes your nenomed stuck
O, what a rash and bloody deed is this!
O, I am slain!
Thou wretched, rash, intruding fool, farewell!
For what thou hast done-must send thee hence with fiery quickness. Therefore prepare thyslef. The bark is ready, and the wind at help th'associates tend, and everything is bent for England.
Claudius exiles Hamlet to England as punishment for the murder of Polonius.
And so have I a noble father lost and a sister driven into desperate terms. But my revenge will come. Let Hamlet come. It warms the very sickness in my heart that I shall live and tell him to his teeth, thus didst thou.
Ophelia drowns. Her brother, Laertes, blames Hamlet for her death. Laertes vows to kill Hamlet when he returns from England. Laertes and Claudius create a plan to kill Hamlet; Laertes will dual Hamlet, but will poison his blade, and Claudius will poison Hamlet's drink.
Hamlet refuses to take a drink so Gertrude drinks for him. But the drink is poisoned, so Gertrude dies.