hassan and his wife are killed by the taliban, as a result hassan's son is put in an orphanage. an old friend of amir's father named Reham Khan calls aamir and asks him to come back to afghanistan. amir flies back to his old home where he discovers that Hassan was his half brother. amir is overcome with regret and guilt when he recalls what happened in the alleyway many years earlier. understanding this new information he is enlightened as to why his own father acted so strangely around hassan compared to the other servants they had. lithe is informed by Rham that hassan had a son and that amir should go get the sun from the orphanage.