Hospital ship

Main
Ha Ji-won as Song Eun-jae[9]
She is a capable surgeon and future chief at a large hospital located in Seoul who later joins the crew on the hospital ship.

Kang Min-hyuk as Kwak Hyun[10]
Son of a famous well known surgeon. He becomes a doctor because of his father and later volunteers to join the hospital ship as his military service.

Lee Seo-won as Kim Jae-geol[11]
A chaebol oriental doctor whose father is a director of a general hospital. He was placed on the hospital ship and is good friends with Joon-young.

Kim In-sik as Cha Joon-young
A dentist who was placed on the hospital ship. He and Jae-geol are good friends