At three o'clock in the morning, in the emergency room of Renji Hospital, cardiologist Xie Zhiwei received a strange patient - Fu Yuzhou.
He was young, dignified, calm and restrained, and all examinations showed that there was "no major problem". However, Xie Zhiwei saw an abnormality that should not appear in an electrocardiogram.
She pursued all the way and finally discovered that Fu Yuzhou's so-called "heart disease" was not a disease at all, but someone was using an undetectable exogenous substance to slowly and accurately erode his body.
As the investigation deepened, an old electrocardiogram from 30 years ago, a buried medical record, and a mysterious figure codenamed "Shepherd" also revealed bit by bit the Fu family's long-secret secrets - the death of Fu Yuzhou's mother may have never been an accident.
He is her most dangerous patient and the last person she should be near.
When truth and love are approaching at the same time, can they find each other among lies and murderous intentions, and also find the answer that has been delayed for thirty years?
Some diseases are not in the medical records, and some truths are hidden in time.
