When both Yoo Si Jin & Seo Dae Yeong are surprisingly still alive, life seems to bring happiness and joy to them all.

When Alpha Team has been dispatched for another mission, Both Kang Mo Yeon and Yoon Myeong-Joo are receiving devastating news.

When Ahn Jung Joon and Yoo Si Jin are brought in, Kang Mo Yeon gets the shock of her life and is worried sick. The army is now tasked to discover the secret of Ahn Jung Joon.

Now everyone returns to Korea, Life will be back to normal. Dae Young still needs to make an important decision.

When Argus abducts Kang Mo Yeon, Yoo Si Jin rushes to rescue her with approval of Lieutenant General Yoon, however Alpha Team will not let him go alone.

When everyone is doing their best to cure the ongoing M3 virus at camp Urk, Argus abducts Fatima and Kang Mo Yeon.

A package arrives which could damage both Seo Dae Young & Yoo Si Jin's relationship with their girl, while Si Jin has been ordered by Lieutenant General Yoon to leave Argus alone. Next to that, there is an outbreak of a M3 virus.

Now everyone knows Kang Mo Yeon's feelings about Yoo Si Jin, she's embarrassed and keeps running away from him. Dae Young receives some good news, while Si Jin meets up with Argus again in 'The Haunted Village'.

Yoo Si Jin and his squad are tasked to find the last three missing persons inside a building that could collapse at any time.

During the rescue operation in Urk, Yoo Si Jin forces Kang Mo Yeon to make an impossible decision.

Yoo Si Jin returns to Korea to attend his father's retirement celebration from the Army. The medical team have packed their stuff and is ready to leave, when suddenly an earthquake changes their entire plan.

Yoo Si Jin recognized a person he captured before, but bumps into a more unpleasant surprise, while Kang Mo Yeon is stuck in her car hanging over a cliff as she didn't pay attention to traffic ahead of her.

Yoo Si jin tells Mo Yeon to operate her patient and commands his team to protect them, even when this means to disobey a direct order from above. While it's still unknown whether their patient will recover, Yoo Si Jin will face the consequences for his disobedience.

The medical team settled down and is ready to take blood samples from soldiers, when a truck crashes in a mountain pass nearby their base. However this crash is more complicated than they initially thought.

Yoo Si Jin returns after being deployed to Afghanistan and meet up with Kang Mo-Yeon during his two free weeks before being deployed to Urk for eight months. Kang Mo-Yeon tells him that her vision of life is completely different than that of Yoo Si Jin and therefore she can't be together with him.

After giving first aid to a thief they just tackled, Seo Dae-Young and Yoo Shi Jin discover that Seo Dae-Young's phone has been stolen. Their search for his mobile leads them to Haesung Hospital where they bump into Doctor Kang Mo Yun, which is distrustful to their intentions.