n Episode 4 of the K-drama "Queen of Divorce," the narrative delves deeper into the complex life of Kim Sa-ra, a divorce troubleshooter, and her business partner, Dong Ki-joon, a former prosecutor. This episode centers on the case involving Sa-ra’s ex-husband, Noh Yul-seong, and his current wife, Han Ji-in, who seeks Sa-ra’s assistance in securing a divorce from Yul-seong.

The episode opens with Ji-in approaching Sa-ra for help. Initially hesitant, Sa-ra’s interest is piqued when Ji-in offers a connection to her child. Despite Yul-seong's attempts to dissuade her, Sa-ra decides to take on Ji-in’s case. Yul-seong, determined to expedite the divorce, finds his efforts thwarted by Sa-ra's involvement. Ji-in stands firm, refusing to sign the divorce papers without a fair settlement.

The plot thickens with the introduction of a blackmail scheme. Ji-in fears Yul-seong possesses a video that could jeopardize her and her politician father's reputations. Sa-ra and Ki-joon uncover that Yul-seong’s threats are baseless, aimed merely at intimidating Ji-in. The real blackmailer is revealed to be Dae-ki's brother, who is eventually apprehended by Dae-ki.

Tension escalates when Sa-ra is mistakenly kidnapped, believed to be Ji-in. Displaying resourcefulness, Sa-ra and Ki-joon manage to escape from their captors. Meanwhile, a new character, Jang Hee-jin, is introduced. She joins Sa-ra’s firm, Solution, as a manager but is secretly a spy for Yul-seong, aiding him in his blackmail efforts against Ji-in.

The episode closes on a poignant note, with Ki-joon witnessing Sa-ra embracing another man, presumably Dae-ki, which stirs questions about the dynamics of their relationship.