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.