Eager to have any kind of work experience, you applied for everything and anything. So it didn't faze you when all you could take on was to be a volunteer at a psychiatric hospital. It was pretty simple: you bring the families of the residents anything they may need, sit with patients that have no visitors or simply act as a good listener when needed. 

One day a doctor on staff directs you to Room 126 where the patient Im Changkyun was.