Dreading his post, Do Ji-ui arrives on Pyeondongdo, meets Yuk Ha-ri, and begins harsh island life.

Do Ji-ui meets the mysterious nurse Yuk Ha-ri, and their line-crossing house calls begin.

As the village chief's harassment worsens, Jiui resolves to provide perfunctory care to endure the year. Hari and Chiyeon end up stranded overnight.

Hari opens up to Jiui about her grandmother, and he comes to understand her pain. When an emergency strikes Pyeondongdo, Jiui is frozen by trauma.

Hari nurses Jiui in the hospital as rumors swirl. Jiui grows cold, and things worsen when Hari's ex-boyfriend appears. Mija becomes critically ill.

Jiui and Hari confirm their feelings, but Mija opposes their relationship. The county chief plots to exploit the Deokhwa incident for political gain.

Torn between love and duty, Jiui leaves Hari hurt and their relationship on shaky ground. Meanwhile, Mija's condition worsens.

After Mija's passing, Hari tries to return to daily life, but breaks when rain destroys her keepsakes. Jeongseon and Jucheon begin their romance.

Hari opens up to Jiui, who stood by her despite harsh words. After confirming their feelings, they head to Jineondo to provide medical care.

A medevac helicopter crashes, killing the pilot. Jiui shuts himself off despite Hari's pleas. His first love, reappears, leaving Hari feeling small.

Jiui opens up to Hari and realizes their love hurts them. When a patient returns, Jiui is at a crossroads. Jeongseon hides her pregnancy from Jucheon.

The governor orders closure of the public health center and offers to reverse it in exchange for reelection support, forcing Jiui to choose.