The third episode of Netflix's Hospital Playlist gave us a view of Jung-Won's day in his clinic. A mother with her baby boy came in for a check up due to stomachache. Seeing Jung-Won, the baby cried continuously. As a pediatrician doctor, he sang and played with his patient to be able to check the child's health condition, but he wasn't able to further check the boy since an urgent call came in for another patient.

Jun-Wan entered his clinic to discuss with an elder patient with a heart problem who needed to have a surgery. Jun-Wan is a cardiothoracic surgeon. He takes care of his patients and goes the extra mile to assist them. The elder patient is subject for an immediate operation to avoid any complication. On the other hand, the wedding of the patient's daughter will overlap his surgery schedule. But Jun-Wan doesn't want to postpone the operation for her father's welfare.

Song-Hwa is a neurosurgeon and trained two resident doctors in her department. She constantly evaluates Suk-Min and Chi-Yong's performance. Song-Hwa would ask the resident doctors or their recommendation with all her patients.

A newly born baby is admitted due to heart failure. The baby needed to undergo an immediate operation. Jun-Wan rescheduled twice already since the baby's body temperature is not stable. He asked for the baby's guardian to provide an update and he found out the parents are in their twenties. After two days, Jun-Wan proceeded with the surgery. The baby's heart was able to pump on its own and the vital signs were all well. Jun-Wan and his team operated for almost four hours. He informed the parents of the successful outcome. They shed tears of joy and were grateful of Jun-Wan.

The five doctors gathered to have their lunch in Song-Hwa's clinic. As usual, they teased and mocked each other's funny moments. Everyone cheered a song they loved to sing during their college years.

Ik-Jun's wife is coming back from overseas and scheduled to see him and their son. They have not seen each other for almost two years because she preferred to work abroad. This is why Ik-Jun takes care of his son with the help of his mother.

The following day, Ik-Jun met his wife. Ik-Soon suggested they go somewhere private because she wanted to discuss an important matter: divorce. She claimed that she was not happy with their long-distance relationship. Ik-Jun was shocked and persuaded his wife that they resorted to such decision since she wanted to pursue her career. But Ik-Soon remains firm with what she wants.

The next day, Jun-Wan and his team went on with the surgery for the elder patient. The team completed the surgery and the patient is stable. Jun-Wan attended the elder patient daughter's wedding since it fell on the same day as her father's operation. Jun-Wan is supportive of his patient's welfare and their family.

In the hospital, Ik-Jun stayed in his clinic during the day. He couldn't stop thinking of his wife. Ik-Soon took their son out for dinner. That night, his son returned home with rashes and fever. Ik-Jun discovered that his son had allergies when Ik-Soon took him out. Ik-Jun asked his mother about the name of the restaurant. He called the restaurant to check what food his wife ordered. The restaurant manager on the other line mistakenly asked him that he ordered a salad with peanut sauce. His wife also agreed with it. Ik-Jun, was speechless and played along with the conversation. The manager thought he was the man that Ik-Soon brought with her in the restaurant that night. Ik-Jun was bewildered how it all happened with his wife.