Meanwhile, the FBI finds a clue deep in the forest—a trace of a chemical compound known as Aqua Regia. It's a dangerous mixture of hydrochloric acid (HCl) and nitric acid (HNO₃), capable of dissolving metals.
The FBI suspects that Dr. D's base must be somewhere nearby. Even after 24 hours of intense searching, they find no solid evidence—because Dr. D is extremely clever and leaves no trace behind.
---
Cut to: Inside the bunker
Inside the underground bunker, Ethan and his friends are secretly planning their escape.
Ethan stands up and says seriously:
> "We'll begin the plan five days from now. Who's with me?"
But no one steps forward. A few prisoners nervously respond:
> "If we try anything, we'll be killed before we even get close."
Ethan clenches his fists and says:
> "So you'd rather just sit here and wait for death? I'm not doing that. I'm going to save both of them—no matter what. Even if I have to go alone."
Then, ten people step forward—they are his close friends who understand his determination and courage.
---
The plan begins...
Five days before the escape, they quietly begin untying their ropes. One of the girls has a sharp pin hidden in her hair, and they use it to slowly cut their bindings.
They all wait eagerly for the fifth day.
When the day arrives, Ethan divides them into two teams:
1. Team One (tasked with safely leading everyone out) – Led by John
2. Team Two (tasked with rescuing the two captured friends) – Led by Ethan
---
The action begins…
When a soldier comes in to deliver food, they knock him out from behind and take his uniform. Then they use the disguise to lure the two guards at the main gate inside—and knock them out too.
John leads the first group through the secret tunnel to the exit.
Ethan and his four teammates begin the rescue mission.
But there's a problem: only Ethan has a uniform. The others are still at risk of being caught.
Ethan skillfully moves ahead, taking out guards one by one and stealing their uniforms for his teammates.
---
A chilling discovery…
When they reach the room where the two hostages are held, they find a piece of paper—written by a previous captive:
> "Dr. D runs experiments—mostly on older people. He's trying to create a vaccine that keeps people young forever.
But to test his unfinished versions, he uses teenagers as subjects.
If the vaccine works, it's fine. But if not—it rots the body from the inside out.
It's agonizing… I was the last kid he was going to test it on. He told me:
'You're about to die, and it doesn't matter what you know.'"
Reading this, Ethan and his friends are horrified.
> "We need to move fast! We have to save them now!"
---
Meanwhile, John's team…
John's team is close to the exit.
But just then, a soldier becomes suspicious.
He stops John and says:
> "Take off your mask…"
---