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Famous psychiatrist, Dr. Go Yi-seok, crosses paths with a young woman with social anxiety disorder, Cha Hong-do. Hong-do comes to his office to discuss his new book, and finds him atop his patient, a pen lodged in the patient's throat. A 911 call launches an investigation.

Dr. Go's patient wakes up at the hospital and claims to have inflicted his wounds on himself. Dr. Go's name is cleared, but his reputation has been damaged. Hong-do wants to fix her blushing face.

Hong-do barters with Dr. Go for free counseling, and for their first session, she confesses her love to Doo-soo. Hong-do observes Dr. Go cracking the core of a patient's mental issues.

Hong-do gets drunk on a date with Go Yi-seok, and jeopardizes her job at President Go's mansion. Dr. Go uses Hong-do to try to get back on track. Doo-soo confesses his coming marriage to Hong-do.

Oh Young-rae gets her job back with President Go. Hong-do's sudden love life is in limbo. Doo-soo finds out about Hong-do's one-night-stand with Go Yi-seok, and seems to fall for Doo-soo even further.

Go Yi-seok's father returns from America after estranging himself from the family, shaking up the household. Hong-do reacts to Go Yi-seok sharing details of their private night with Doo-soo.

Doo-soo calls off his wedding, tells his Aunt he's done with blind dates, and takes Hong-do out on a date. Go Yi-seok struggles to understand his two newest patients.

Se-ro begins to fall for Doo-soo. With Hong-do's help, Dr. Go helps the twins get to the bottom of their problems. As Go Yi-seok falls further in love with Hong-do, she begins to crawl out of her helmet.

Go Yi-seok's ex-girlfriend calls him to vent after making a big mistake at work. Unfortunately for Hong-do, she calls at the worst possible time. Doo-soo confronts Go Yi-seok about his actions.

President Go starts to fall in love with Oh Young-rae and tries to make a move, but his health doesn't comply. On their make-up date, a huge discovery is made. Hong-do helps crack another case.

As President Go's health deteriorates, he falls harder and harder for Ms. Oh. Se-ro keeps trying to get noticed by Detective Jang, but he can't get over Hong-do.

A bombshell revelation rocks the family as the coincidences begin to domino into a nightmare for all parties. Hong-do's landlord wants her out as soon as possible. Mrs. Hwang leaves in a fit of fury.

Yi-seok's mother confronts Cha Hong-do with a previously unknown new truth, sending Hong-do into a downward's spiral. Se-ro struggles in her newest role, as her lack of success begins to deflate her.

Go Yi-seok eventually and accidentally finds out what his family already knows, and tries not to break down. Hong-do regresses dramatically and runs away. Doo-soo tries to calm her down.

Detectives Yang and Jang pursue a photograph that was left uninvestigated at the scene of the fire. Go Yi-seok and Hong-do estrange themselves from one another. Se-ro plans to move back to the U.S.

Hong-do confronts President Go about his lies. The truth comes out and the Go family stabilizes. Se-ro is ready for her flight to the U.S, while Doo-soo still tries to understand his feelings for her.