Bernardo and Marcellus had seen the kings spirit and had told his son Hamlet. The king had been poisoned by his uncle.
Horatio tells Hamlet that he had seen his father. Hamlet then decides to go on a look out for his fathers spirit.
i had seen your fathers spirit Sir!
guard your chastity Ophelia!
Laertes tells Ophelia that she should end her relationship with Hamlet and to guard her chastity, and she agrees with him.
Hamlet, Horatio, and Marcellus wait outside for the Kings ghost to reappear. The ghost then appears and asks Hamlet to follow him. Horatio and Marcellus try to keep Hamlet for following the ghost, but he does not listen
i shall follow the ghost!
IT WAS CLAUDIUS???
Once Hamlet and the ghost are alone, the ghost reveals that he was murdered by his brother Claudius. The ghost seeks revenge on Claudius. Hamlet decides to give revenge to Claudius upon his fathers murder.