Episode 4 of "Who is She" kicks off with an intense confrontation between Mal-soon and Ae-sim, as the former stands rigid, her expression stone-cold, refusing to acknowledge her foe's presence. The stark revelation that UNIS, the very company she aspires to join, belongs to Ae-sim throws Mal-soon into a dilemma, torn between nurturing her dreams and seeking justice for a past injustice.
Flashing back to a pivotal moment, we uncover the heart-wrenching tale of how Ae-sim betrayed Mal-soon by stealing "The Man in a Yellow Shirt," a debut song penned by a boy who harbored a crush on her. Blindsided by her inability to decipher musical notes, Mal-soon entrusted her friend from the club, Ae-sim, with the task of recording the song, a promise thatAe-sim broke, leaving Mal-soon's talent buried under layers of deceit.
In the contemporary timeline, Ha-na's wise counsel resonates deeply within Mal-soon's heart, reminding her that the pursuit of dreams transcends the desire for vengeance. With a renewed sense of purpose, Mal-soon decides to embark on her journey of self-actualization, prioritizing her aspirations over the shadow of her past grievances.
Elsewhere, Ji-sook makes a bold decision to strike out on her own, leaving the comfort of her mother's abode. Meanwhile, Mal-soon's training intensifies, with Ha-na coaching her on how to shed the aura of a grandmother and embrace a fresher, more vibrant image. Just when Mal-soon seemed to be making strides, Emily's group members resort to despicable tactics once again, this time leveraging Emily's prescription medications to threaten her. The discovery of these medications serves as a stark reminder of Emily's fragile health, plunging Mal-soon into a mix of empathy and determination.
Ha-na ultimately unveils to Mal-soon a mesmerizing clip showcasing Daniel's boy band performances, recounting how the group's disintegration stemmed from Daniel's confession about his relationship with their obsessive fan. Meanwhile, Daniel receives a chilling text message from his former stalker, who has returned to Korea after dissolving her marriage. Plunged into anxiety, he bumps into Mal-soon, who invites him to share a meal. Her mere presence acts as a soothing balm, lifting his spirits.
The following day, Mal-soon stumbles upon Ji-sook exiting a real estate office and catches snippets of gossip from the neighborhood elders about Ji-sook's search for a new abode. Additionally, she catches her son-in-law in a clandestine meeting with an unfamiliar woman. Elsewhere, the depth of the scandal that drastically altered Daniel's life unfolds, revealing Ae-sim as his aunt. Daniel confides in her his intention to depart Korea promptly after the group's debut.
Park Gab-young, after days of relentless searching, finally reconnects with Mal-soon, now embodying Emily. She confirms her identity by unveiling an embarrassing anecdote from Gab-young's past, then enlists his help in tracing a taxi driver with the license plate number 333, presenting him with a stamp from his photography salon as proof.
On the subsequent day, Ha-na integrates into the debut group's trainee ranks alongside Mal-soon. They are informed of a reassessment for all trainees to finalize the group's lineup, a revelation that irritates the incumbent members. In accordance with Mal-soon's wishes, Gab-young orchestrates her reunion with her family.
Elsewhere, Emily, who had initially plotted her departure for the United States, reverses her decision and finds herself at UNIS, where she unexpectedly encounters Ha-na once more. Emily snubs Ha-na's greetings, further complicating an already tense situation. However, Ha-na, steadfast in her resolve, insists on escorting Emily back to Mal-soon's residence. The episode concludes with an electrifying confrontation between Mal-soon and Emily, as they stand face-to-face once again in Mal-soon's home.
