Contains spoilers for this episode and earlier episodes.
The base works to contain the M3 outbreak while Myung-joo's condition worsens. Dae-young, isolated after embracing her, speaks to her over the radio, and the distance makes their feelings harder to hide. Dr. Song researches treatment with help from colleagues in Seoul. During a power failure, Chi-hoon risks exposure to keep Manager Jin alive. The earthquake survivor sees him act and acknowledges him as a doctor, allowing Chi-hoon to begin recovering his confidence. Myung-joo calls her father, apologizes for their earlier argument and asks him to let Dae-young remain a soldier. She then collapses as the team struggles to lower her fever.
Daniel's shipment of medicine is hijacked, and Agus demands the diamonds in exchange for its return. Shi-jin and Dae-young recover the supplies, and treatment helps Myung-joo begin to improve. Mo-yeon accompanies Fatima when men claiming police authority take the girl away. Connected to Agus, they use Mo-yeon as a hostage to force Shi-jin to arrange his escape from Uruk. Official orders tell Shi-jin to wait, but he prepares to rescue her himself. He leaves his uniform and identification behind, obtains weapons and calls in the favour owed by the Arab patient's representative. Dae-young discovers the uniform and realizes his friend's intention.