Kang Mo Yeon is a skilled cardiothoracic surgeon who believes hard work should matter more than connections, yet she often faces limits she cannot overcome within the hospital system. Yoo Si Jin is a special forces captain whose duty to protect others shapes every part of his life. Their paths cross in the emergency room after Si Jin helps capture a thief, and he is immediately drawn to her. Mo Yeon mistakes him for a criminal at first, but soon learns the truth.
They begin to date, yet their worlds clash. Si Jin regularly faces dangerous missions, while Mo Yeon fights to save every life she can. Their different roles and values push them apart, and they part ways believing their lives are too far removed.
Months later, Mo Yeon is sent to lead a medical team in the remote country of Uruk after refusing the advances of her hospital chairman. There, she meets Si Jin again, now deployed with his unit as war approaches. Working side by side in a place defined by crisis, they confront their unresolved feelings, their opposing responsibilities, and the risk of loving someone who may not return home.
Their story follows how they reconnect while facing disaster, healing, and the realities of duty and compassion in a conflict zone.
