I didn't understand last few chapters. Can someone be kind and summarize it for me?

So Taeui found out that they are secretly making weapons and selling them to other countries. He asked his uncle to leave and to start a new life somewhere else with a new name. In the last chapter he is in a new country and he meets someone who likes books. He realizes that is man sounds like Riegrow’s brother who he hasn’t met but has heard about from Riegrow and his uncle who is friends with and orders books from. And at the end of the chapter we see the past where Taeui tries to drug Riegrow in order to leave without Riegrow knowing. But his luck is so bad that he comes to a different country and he just happens to befriend Riegrow’s brother and offer him a ride.

Oh thanks alot