Barnardo, Horatio. and Marcellus are watching over the castle when a ghost who looks like the late King Hamlet suddenly appears. They decide to tell the kings son Hamlet, the ghost tells young hamlet that he was killed by his brother who is now the king of Denmark. The ghost asks young Hamlet to seek revenge and kill the man who killed him.
Polonius instructs Reynaldo to go spy on Laertes while he is away at school. Ophelia tells her father Polonius that Hamlet is acting crazy, he automatically thinks he is crazy because of his love for his daughter. He goes to tell the king and queen.
Hamlet invites the king and queen to attend a play arranged for them in particular. Hamlet gives a "to be or not to be" speech. Ophelia gives hamlet back his gifts to her, he berates her and leaves. The king announces he would like to send Hamlet to England and the queen gives Polonius the permission to eavesdrop on Hamlet.