Episode Summary
Shen Yang discovers that the drug trial data at her company is corrupt. She tells Chen Hansheng, who warns her to stay away from it. Meanwhile, Frank tries to arrange for Dr. Shen to see his daughter, Shen Yang. He uses Zhou Tianna as a go-between, but she betrays him to the Gaia Group. The meeting turns into an ambush by mercenaries. Frank and Dr. Shen escape. The mercenaries cross into China, triggering an anti-terrorism operation. The Cheetah unit, including Chen Hansheng, engages and eliminates the mercenaries in their first real combat mission.

Spoiler Alert
Shen Yang's Dangerous Discovery
Let's start with Zhou Tianna. She pulls Shen Yang aside for a little chat. She acts like she's worried about Shen Yang. She warns her not to spread rumors about what she saw at the office. But really, Zhou Tianna is just trying to control the situation. She doesn't want Shen Yang getting caught in the crossfire. Later, Chen Jun worries that Shen Yang will mess things up. Zhou Tianna shuts him down fast. She makes it clear that no one is allowed to hurt Shen Yang.
After that, Shen Yang finally moves into her new place. Chen Hansheng and Lei Peng are there to help with the heavy lifting. To thank them, she buys them coffee. Then she drops a bombshell. She tells them about a huge problem she found at Ruihe. It's a pharmaceutical company. Their clinical trial data has to be perfect. But Shen Yang found data with massive errors. She doesn't know if Zhou Tianna is aware. She has no idea what's really going on behind the scenes.
She asks Chen Hansheng and Lei Peng for help. She needs them to find evidence. Chen Hansheng immediately tells her it's a bad idea. First, this is a corporate secret. Digging into it is illegal. Second, it could get her into serious trouble. Shen Yang sees his point. She agrees to think it over more carefully.
A Trap Is Set
Frank's Plan Goes Wrong
Frank is in a tough spot. He's on the run and has to protect Dr. Shen. But he's still trying to make things work. He finds another Chinese company willing to partner with Dr. Shen. There's a catch, though. Before they can go back to China, Dr. Shen has to complete a four-month research project somewhere else.
Dr. Shen agrees. He only has one condition. He wants to see his daughter. Frank understands. He decides to make it happen. He contacts Zhou Tianna to arrange a meeting between Dr. Shen and Shen Yang.
Zhou Tianna's Betrayal
This is where everything goes sideways. Frank has no idea that the Gaia Group has already contacted Zhou Tianna. She learns that Frank has cut ties with Gaia. So, Gaia makes her an offer. They will pay her a lot of money. All she has to do is lure Frank to a specific location. Zhou Tianna takes the deal.
Frank walks right into the trap. He brings Dr. Shen to the meeting spot. Dr. Shen is excited. He thinks he is finally going to see his daughter. Instead, they are ambushed by mercenaries hired by Gaia. They barely escape with their lives. Andre, one of the Gaia guys, learns that Frank was planning to use a helicopter to get into China illegally. The failed ambush doesn't stop them. The mercenaries cross the border into China to continue the hunt.
The Cheetah Unit Faces Its First Test
Ambush at the Border
The mercenaries crossing the border triggers an emergency. The Cheetah unit is scrambled for an anti-terrorism mission. This is it. This is the first real, life-or-death mission for Chen Hansheng and the other new recruits.
The team works perfectly with support units. They get to the target area ahead of time. They set up an ambush and wait. The mercenaries walk right in. After the enemy opens fire, the Cheetah unit returns fire. The battle is intense. But the Cheetah soldiers complete the mission without a single injury. All the mercenaries are killed. During the cleanup, Chen Hansheng finds something on one of the bodies. It's a photograph of Dr. Shen. At this point, Chen Hansheng has no idea who this man is.
The Aftermath
Back at the base, the new guys can't sleep. Chen Hansheng and his friends are up all night. The reality of what they did is sinking in. They are now soldiers who have fought on a battlefield. They have killed the enemy.
Their commander, Ling Zhengrong, overhears them talking. He had planned to give them time off to rest. He changes his mind. He decides they need training, not sleep. He orders them to go run ten kilometers. After the run, he tells them they did an outstanding job. He says for a first combat mission, their performance was excellent.
Later, the Chief of Staff reviews the mission with Ling Zhengrong. He points out some issues from the fight. He tells Ling to create targeted training to fix them. Ling Zhengrong confirms he already has a plan in place.