This drama tells the story of a vampire, Park Jishang.He is an ostensibly a doctor working in a hospital, but in fact he has an unknown mysterious identity.He is calm and wise, but he carries the loneliness and past that cannot be shown to others. Yu Lida is the dazzling star doctor in the hospital.She is the niece of the chairman of the board of directors, with a prominent background and outstanding talent, and is a typical "winner in life".However, she looks arrogant and indifferent on the outside, and is used to the existence of stars like the moon, but she hides unknown fragility and persistence in her heart. Lee Jae-wook is the common boss of the two, a man who is gentle and humble on the surface but is actually ambitious.His smile was as gentle as the spring breeze, but his eyes were filled with sharpness.As the plot progresses, he gradually reveals his true face, becoming the most dangerous opponent of the protagonists, and also pushes the power and emotional entanglement between the three to a climax. In this hospital full of life and death, a story about desire, secrets and redemption quietly unfolds...