Professors Kim and Oh spar together, in what looks like more of a courtship dance than anything else. Kim finds it very sexy when Oh kicks his ass, and he angles for a kiss, but she’s too worried about Chi-ang and Shi-woo alone up on Moorim Peak.

The boys are starting to lag, and Chi-ang decides to test Shi-woo’s hearing. He only succeeds in annoying Shi-woo by whispering his name over and over, ha. But he’s not kidding when he steps on something with his sock foot and hurts himself, and he gives Shi-woo his best puppy-dog eyes and asks yet again to switch shoes. It almost works, but Shi-woo saunters off again, leaving Chi-ang shoeless. Shi-woo is made of sterner stuff than I am, clearly.

So Chi-ang is forced to use his tie and leather wallet as a makeshift shoe, which is pretty damned resourceful for a spoiled rich kid, and even seems to impress the stoic Shi-woo. The kids back at school find them with Nadet’s drone, and worry that they must be hungry and thirsty by now.

Indeed, Chi-ang starts to whine about being thirsty, and Shi-woo finds a little trickle of water for them to drink. They freak out and run when they see a snake, but they get split up in their fear, and the kids argue over which to follow with the drone. They choose Shi-woo, so everyone is worried when he finally stops running and can’t find Chi-ang. Now it’s a real competition, since the boys can’t work together anymore.

We see the mysterious man in the coma, and get a glimpse of his past as he and his family (a wife, and a small son and daughter – twins?) are forced to hide out in a mountain cabin. He tells his wife that he was told to bury the jewels in a secret place that nobody knows, and he knows this place is pretty safe since he used to train here. Wait, is that the little girl Dean Hwang was protecting before?

We get further events from Hwang’s perspective — he had found the wife dead in the cabin some time later. Professor Beop also appears to know something of this, based on the way he’s staring into space thoughtfully.

Alone now, Shi-woo nearly walks right into a large beast, which looks like some kind of otherwordly wolf. The students are watching through the drone, but the wolf-thing sees it and attacks, and puts it out of commission. The beast sees Shi-woo, growls, and leaps.

Without the comfort of being able to see the guys on the mountain, Sun-ah is ready to run up there and find Shi-woo. She tells any other kids who want to help, to meet her at the front doors.

Shi-woo runs from the beast, but finds himself face-to face with it again. It jumps up at him and knocks him down, and he gets up quickly. The jewel in his pendant catches a ray of sun and shines directly into the beast’s eyes, and stops it in its tracks.