Chaos erupts within Sungkyunkwan when Ha In Soo finds out that Kim Yoon Shik is really a girl.

The hunt for the Red Messenger becomes more intense, and Lee Seon Joon makes a self- sacrificing decision that affects the other three friends.

Seon Joon and Yoon Hee's relationship is threatened with heartbreak when they discover the truth concerning the death of Yoon Hee's father.

The Jal Geum Quartet is summoned by the king to solve a political mystery that brings about shocking revelations about the past.

While the Sungkyunkwan scholars prepare for a schoolwide exam, Seong Joon and Yoon Hee's relationship continues to develop.

Seong Joon's engagement to Hyun Hee weighs on his mind as he grapples with his attraction to Yoon Hee, who he still believes to be a man.

In Soo becomes increasingly adamant in discovering the Red Messenger's true identity. Rumors of intimacy between Jae Shin and Yoon Hee spread throughout Sungkyunkwan.

Jae Shin and Seon Joon's competing affections for Yoon Hee intensifies during a sports match. The fake Red Messenger continues to cause trouble.

It's Open House at Sungkyunkwan and visitors swarm its campus. The hunt for the Red Messenger continues to intensify while Seon Joon grapples with his attraction to Yoon Hee.

The Red Messenger continues to wreak havoc while the king makes a decision that rattles the political factions. Yong Han schemes to bring Yoon Hee and Seon Joon together.

Yoon Hee and her Sungkyunkwan friends set out to find the elusive thief. They are surprised to discover, however, that the person behind the robberies is not the criminal they expect.

The scholars return to Sungkyunkwan from their break, and there is already trouble. A thief has stolen several valuables, and Yoon Hee is accused of being the culprit.

Sungkyunkwan scholars are permitted to visit home during break. Meanwhile, suspicions continue to arise regarding Yoon Hee's true gender and identity.

The day of the Archery competition has finally arrived. Much is at stake for Yoon Hee, whose very fate at Sungkyunkwan will be determined by the match's outcome.

Yoon Hee's fellow Sungkyunkwan scholars rally behind her as she trains in earnest for the Archery competition.

Professor Jung discovers Yoon Hee's true identity and leaves her unnerved. She faces the threat of expulsion and the unspeakable charge of offending her family and the king. 

In Soo underestimates the loyalty Sun Joon and Yoon Hee have for each other. An archery competition brings about startling consequences for Yoon Hee.

Politics and discrimination enter Sunkkyunkwan as Ha In Soo pressures Su Joon to live in the Western dormitories with the rest of his political faction.

Sun Joon challenges Kim Yoon Hee to take the entrance exam to the all- boys school Sungkyunkwan university, not knowing that she is a girl in disguise.

In order to make money for her family, Kim Yoon Hee takes tests and create cheat sheets for lazy scholars, bringing her face to face with the upright Sun Joon.