"Dr. Stranger" Park Hoon (played by Lee Jong Suk) thought he had met Song Jae Hee (played by Jin Se Yeon) who he was dying to meet but Han Seung Hee (played by Jin Se Yeon) refused to say that she was Song Jae Hee.

Oh Soo Hyun (played by Kang So Ra) showed Han Seung Hee's "connect me" to Park Hoon and expressed her feeling saying that she's not her.

Park Hoon took Oh Soo Hyun's cell phone and was looking at the connect me as she is showing a completely different information than Song Jae Hee with different expressions. In the picture, Han Seung Hee had a different father than one of Song Jae Hee.

Han Seung Hee seemed to have lived a calm life after graduating from Tokyo University and Park Hoon though trying to look for something similar to Song Jae Hee was disappointed.

Park Hoon was confused thinking she may not be Song Jae Hee and cried, triggering the hearts of viewers.

"Dr. Stranger" is centered on Park Hoon and has a strange love triangle between Han Jae Joon (played by Park Hae Jin) and Oh Soo Hyun (played by Kang So Ra) and a desperate melodrama to Song Jae Hee (played by Jin Se Yeon) that centers on the identity of Han Seung Hee (played by Jin Se Yeon).