Kai and Riku, being left alone, searches for Saya in Hanoi, believing that she might be there. They also meet a girl named Mui, who has lost a leg.
That is because she was looking for mines to sell for scrap (she told Kai and Riku that it was caused by an accident, but they were actually searching for the mines to sell them as scrap).
So, they get an introduction to her life, and what she is doing. Riku ends up buying her a metal detector because she said it would help her parents, but the real reason (which Riku understand later) is to search for mines again.
So, they go looking for her, and they find her, and stay over the night.. But, then they get kidnapped by someone.
Meanwhile, reporter-dude also heads out to investigate. I have the feeling he will be important later on...
Anyhow, a great episode! 8.7/10