D-Day

Hae Seong and U Jin, with different motives, work at Mirae Medical Center and clash about treating a patient.

A sinkhole leads to injuries, but not all patients are accepted at Mirae Medical Center. Hae Seong steps in.

An earthquake strikes Seoul. Hae Seong and Ttol Mi try to save their patients at Hangang Mirae Medical Center.

Hae Seong, Ttol Mi, and Hangang Mirae patients are on a ship to escape further tragedy. Where are they headed?

In the midst of the emergency, Mirae Medical Center starts triaging patients, but only selectively.

The hospital is quickly losing blood and supplies. How will they continue treatment without government aid?

Hae Seong and Ttol Mi become each other's strength. Mirae Medical Center becomes a base for the firefighters.

Mirae Medical Center is on the verge of losing power, but an aftershock worsens the situation.

Hae Seong clashes with Park Geon and U Jin over Min Cheol's transfer. He and Ttol Mi share an unspoken bond.

Hae Seong is forced to leave the hospital. The Disaster Medical Assistance Team is formed.

Ji Won needs emergency treatment, and Hae Seong has to fill in for the lack of available doctors.

Hae Seong's personal issues haunt him and even prevent him from performing his duties as a doctor.

Hae Seong joins DMAT to help treat the rescued at the scene. He makes a decision on the injured Yeong Tak.

Park Geon tries to suspend Hae Seong's medical license for disobeying orders and doing reckless surgeries.

U Jin tries to stop Park Geon from threatening Hae Seong, but Park Geon turns on him instead.

Ja Hyeok asks Il Seop for help on a deadly mission to recover the Yeouido conduit, but Il Seop hesitates.

Korea is on the verge of a national bankruptcy due to the earthquake. Ja Hyeok demands help from Il Seop.

Hae Seong is heartbroken as he watches Ttol Mi turn away from him after he refuses to operate on her father.

Hae Seong's medical license is at risk again with the return of the department chiefs. U Jin's help fails.

Hae Seong and Ttol Mi grow closer, but her return to Busan for her father's recovery tests their bond.