Macbeth Act II, Scene iv Summary

Ross chats with a conveniently placed wise old man, who is disturbed by the night's strange events – both the King's murder and the weird things going on in nature.
Ross says the heavens are clearly troubled by the unnatural act (a king's murder) that took place on earth. "Nature" has gone haywire as a result: Ross notes that even though it's the middle of the day, it's completely dark outside. The old man watched an owl murder a hawk and Ross notes that Duncan's horses broke free in a rage, to which the old man adds that the horses ate each other. Yep, says Ross, I saw the whole thing happen.
Macduff, yet another Scottish nobleman, shows up. He says the dead guards "were bribed" to murder the king and that Malcolm and Donalbain look pretty suspicious, having left town so quickly and all.
Macduff notes that Macbeth is on his way to Scone to be crowned King, and Duncan is being put in a freshly dug grave.
Everyone goes their separate ways.