Fan Wenning (played by Lian Bingfa), a foreign physician who is invisible in Taiwan, worked with Zheng Wanping (played by Zhang Junning) to treat patients in an aura accident, but was involved in medical controversy and forced to flee. Faced with the advance of black and white forces, they struggled between law and human nature from opposition to cooperation, and the two lonely souls met from then on...

On the last day of 2017, Fan Wenning served as a cleaner at Weida Hospital. He used his job to collect discarded drugs and medical tools from waste boxes.Little did he know that he was actually a licensed qualified doctor in Vietnam.

That night, Fan Wenning witnessed doctor Zheng Wanping performing a strange operation on the little boy in the freezer in the morgue - she relocated a skull back into the little boy's skull.When Zheng Wanping discovered the medical tools in Fan Wenning's hand, she threatened him not to reveal what he saw tonight, otherwise he would report his illegal possession of medical items.Fan Wenning counter-threats that he could also report Zheng Wanping's illegal medical practice just now, and the two reached a delicate balance.

Afterwards, Zheng Wanping picked up his son Haohao from school at the station. At the same time, the human resources agency boss Liu Tiancheng came to Fan Wenning with an injured migrant worker.Fan Wenning often provides medical assistance to migrant workers who do not have residence permits.However, the injury was too serious this time and minor surgery was required.Liu Tiancheng cleared a temporary surgical space for Fan Wenning in the station toilet.Haohao accidentally discovered this secret and followed them to the toilet, helping Fan Wenning a little.

On the other hand, Zheng Wanping, who could not find his son, also came to the toilet. The criminal policeman Wu Zhenhua at the station was also present to help find it.Haohao witfully pretended to have an epileptic seizure, helping Fan Wenning take the opportunity to escape the scene.

Fan Wenning's mother came to Taipei to work as a home caregiver for her livelihood, and was responsible for taking care of Liu Tiancheng's mother.However, an accident allowed Fan Wenning's mother to be admitted to the hospital.With the help of Liu Tiancheng, Fan Wenning began to engage in underground medical work in Taipei.

Just as Zheng Wanping was about to get off work, she saw a pair of foreign mother and daughter who could not speak Chinese had difficulty communicating with the nurse, so she asked Fan Wenning to help translate.With Fan Wenning's assistance, Zheng Wanping performed surgery on a foreign girl in private.However, just as they were about to leave, an explosion occurred in the city and a large number of injured people flocked to the emergency room.Zheng Wanping, who was short of staff, had to ask Fan Wenning to lend a helping hand again.

Just as the emergency room was working hard to deal with the many injuries caused by the gas explosion, a father and daughter walked into the hospital, and the father urgently needed treatment due to a stroke.Zheng Wanping quickly performed preliminary treatment, and after the CT scan results came out, she decided to use thrombolysis solvent for the patient according to the advice of her teacher.Although Zheng Wanping was hesitant and believed that he should wait for the diagnosis of the neurologist, he finally performed treatment after the patient's family signed the consent form.

However, the patient's heartbeat suddenly stopped during the treatment process, and this scene happened to be witnessed by Fan Wenning. He immediately stepped forward for cardiopulmonary resuscitation (CPR) first aid.Unfortunately, due to side effects of the drug, the patient's condition did not improve, and the hospital had to notify the patient's family - Zhou Chuanhui, who was also a prosecutor, was mentally prepared.Zhou Chuanhui was unable to accept this fact and asked a doctor who knew about the emergency treatment process to come forward to explain.When Zheng Wanping came to explain the situation, Zhou Chuanhui insisted that the first aid was a male doctor, not the female doctor Zheng Wanping.In order to avoid further escalation of the situation, Zheng Wanping had to ask Fan Wenning to leave the hospital temporarily.

At the same time, due to the sudden outbreak of the air explosion, Zheng Wanping invited the caregiver at home to pick up Haohao from the hospital.However, Maria was careless when she called and failed to notice that Haohao and his grandfather had left the hospital.The grandfather with dementia clamored to go to Chitose Temple, but the taxi driver couldn't find this place.Fortunately, a passing woman discovered the helpless grandparents and took them back to the Vietnamese snack bar she ran out of her own pocket.

In the snack bar, a guest who was dining suddenly fell down, and the proprietress hurriedly called Fan Wenning for help.Fan Wenning arrived quickly and determined that the customer had appendicitis, and underwent emergency surgery on him in a small room in the snack bar.However, at this moment, the police were chasing the fleeing migrant workers and chased them all the way to the snack bar.In order to avoid being discovered by the police, Fan Wenning had to flee the scene in a hurry.

The criminal police were chasing Fan Wenning when they happened to be caught by Zheng Wanping.In order to cover Fan Wenning's escape from the police's pursuit, Zheng Wanping deliberately created chaos.Fan Wenning, who had nowhere to live, then followed Zheng Wanping back to her residence.

At the same time, Maria, the nanny at home, paid Zheng Wanping the salary for the next month in advance, but Zheng Wanping just hoped that she could do her best to do her housework.When Zheng Wanping returned home from get off work, Maria had left without saying goodbye and took away the cash from the house.This incident triggered a dispute between Zheng Wanping and Fan Wenning.

When the criminal police reported to Zhou Jian's case of arresting fugitives, they found that all of these cases involved a foreign doctor.Therefore, Zhou Zheng instructed the criminal police to start the investigation from Weida Hospital.

Fan Wenning really wanted to visit his mother in the hospital, but Zheng Wanping thought it was too dangerous and suggested that he contact him via video call.However, in the parking lot, Fan Wenning met the mother of the little girl who broke her foot last time. At her begging, Fan Wenning decided to help find the little girl's father.As a result, he discovered that this person was the deceased who had sewed his body for him.Although their lives were very difficult, they still warmly treated Fan Wenning, which touched him deeply.

After learning about this, Zheng Wanping said that she would face it with Fan Wenning and she would be responsible for handling these matters.

Fan Wenning once again stepped into Zheng Wanping's house and established a deep friendship with Haohao and grandpa.However, Haohao's condition suddenly worsened, and Fan Wenning and Zheng Wanping hurriedly sent him to the hospital.At the same time, Zhou Jian and the police also found Fan Wenning's information and learned that his mother was receiving treatment at Weida Hospital.

In the hospital, Fan Wenning's behavior made Zheng Wanping feel dissatisfied.The arrival of Zhou Prosecutor and the police forced Fan Wenning to hide everywhere.Fortunately, he got the help of Viagra No. 1 and successfully escaped.But all this was seen by Zhou Jian and the police in the surveillance room through the monitor.

Prosecutor Zhou and the police followed Fan Wenning to a building where foreign workers gathered, but accidentally lost his trace.

Fan Wenning, who returned to Zheng Wanping's house, took the initiative to take responsibility for taking care of his grandfather, while Zheng Wanping stayed in the hospital to accompany Haohao.Zheng Wanping expressed gratitude to Fan Wenning for her care, and Fan Wenning also received a video from Weida No. 1 Skills in the evening and learned that she was keeping her promise and taking good care of her mother.