Laertes, need to get to your ship. You need to behave yourself. Also Ophelia I forbid you from seeing Hamlet.
It's really cold. I hope the ghost shows up.
He will show up just wait.
Laertes is preparing to leave for France and Polonius decides to give him a bit of a lecture on how to behave when away. Preceding that lecture he talks to Ophelia, warning her that she is forbidden from seeing Hamlet.
Hamlet, Horatio, and Marcellus decide to go out in attempts to see the ghost. As they wait in the for the ghost to appear the men think this ghost's appearance may mean bad news for Denmark. The ghost begins to call Hamlet.
Marcellus and Horatio beg Hamlet not to follow the ghost. Hamlet refuses to listen to them. After Hamlet starts after the ghost Marcellus and Horatio decide to follow them.