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.

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 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.