What is yetis mission in tibet through the red box act 2?

Peter's father, Vladimir, has been sent to Tibet to make a documentary film just as the nation is being invaded by the Chinese. Separated from his party, Vladimir must trek alone to the capital of Lhasa while his angry and injured son struggles to bring his father to life through his fantastical letters. Will father and son ever be reunited? A fictional and mythical retelling of Peter Sis' boyhood experience in 1950s Prague, based on his acclaimed book.

Explanation:

glamis thou art, and cawdor; and shalt be what thou art promis'd; yet do i fear thy nature; it is too full o' the milk of human kindness to catch the nearest way: thou wouldst be great; art not without ambition; but without the illness should attend it. what thou wouldst highly, that wouldst thou holily; wouldst not play false, and yet wouldst wrongly win: thou'dst have, great glamis, that which cries, "thus thou must do, if thou have it: and that which rather thou dost fear to do than wishest should be undone." hie thee hither, that i may pour my spirits in thine ear; and chastise with the valor of my tongue all that impedes thee from the golden round, which fate and metaphysical aid doth seem to have thee crown'd withal.  

he lacks ambition.  

he is hesitant.  

he lacks courage.  

he has moral scruples.