Hamlet

Today we read few pages from Hamlet, which for me was a bit difficult because I didnt read the first ones. So i read the whole thing again. So far I understood that Horatio and other friends of Hamlet saw the king's spirit. When they tell Hamlet, he doesnt believe them but still wants to find out the truth. Of course when Oratio and his friend see it they cant believe it and are amazed. Then Oratio is also there and someone tells her that she shouldnt show any emotion while she is with Hamlet. This is so far what I understood, its not much but its pretty hard to understand..