Attorney Oh Su Jae is forced to step down as an adjunct professor; Gong Chan, a student at the law school, encounters Su Jae.

Oh Su Jae decides to take on the role of director of the school's Legal Clinic Center in order to create a favorable public opinion toward her.

Park Ji Young appears at law school; she claims that Professor Oh Su Jae killed her older sister Park So Young; Oh Su Jae decides to take on Park So Young's case as Legal Clinic's first case.

The information that Legal Clinic Center members report to Oh Su Jae is used as an excuse to have Park Ji Young arrested by the police; they obtain important information that can release her and prove that Park So Young's case was a murder.

Oh Su Jae refuses police investigation even after being robbed in a mask; the reason of Su Jae's attack is that Choi Tae Gook, Han Seong Beom, and Lee In Su have USBs that actually belongs to Gong Chan.

Oh Su Jae and the members of Legal Clinic decide to find the 'real culprit' of Park So Young's case, which is clearly a 'murder', while also completing the sale of Hansu Bio.