Hye-in forcefully takes the designer shoes off of Je-na and hurts her without knowing who she is. Je-na is determined to make Hye-in's life miserable at school. Do-eon sees Hye-in's application for enrolment in his father's study and decides to approach her.

Si-eun tells Hye-in about Lee Duk-min who lends money to the kids in urgent need of money. Hye-in ends up borrowing money from Duk-min without knowing the consequences it could bring. Meanwhile, Do-eon asks Hye-in to help him one more time...

Do-eon asks Hye-in to tell him what happened on the night Hae-in fell from the rooftop. But Hye-in sets a condition in exchange for telling the truth. Hye-in gets invited to the sorority party, an exclusive party for the rich. There, she runs into Je-na again.

Je-na confronts Si-eun, telling her to leave Hye-in alone, but Si-eun backs her off with the story of her brother. Hye-in is shocked to find out what Si-eun wanted in the first place, but she doesn't back down and finds a way to make it through.

Na-yeon's family makes complaints to Hye-in's school about her forgery and fraud. Hye-in is on the verge of getting expelled, so she meets the school director of Cheongdam High and begs for mercy. There, she witnesses something she shouldn't have.

So-mang catches Si-eun and Hye-in in the secluded restroom. After hearing how Si-eun blackmailed Hye-in, he promises to help her. On the day of Yul-hee and Woo-jin's anniversary, the ugly truth gets revealed. Hye-in witnesses something she shouldn't have again.

Tensions escalate as Hye In is forced into submission, becoming Yul Hui's pawn. However, Yul Hui's schemes unravel when her role in a setup against Je Na is exposed, putting her in a desperate position. Meanwhile, a new strategy emerges to take down Diamond 6 members, with plans to leak the truth through Black Dog's channel.

Framed in a drug scandal orchestrated by Yul Hui, Je Na’s downfall seems imminent, until her allies step in. Meanwhile, Hye In follows a clue tied to a wrist injury and begins to suspect who holds Si Eun’s phone. With everyone hiding their true loyalties and intentions, can Hye In uncover the truth and protect herself before it’s too late?

Hye-in, a student of Seonwoo Girls' High School, works as a part-timer to make ends meet. One day, she gets a tutoring job for a wealthy middle schooler who wants to go to Cheongdam International High School. While her student is away, Hye-in takes a photo with the student's designer bag, and the photo goes viral.

As relationships twist and allegiances shift, Yul Hui begins reaching out to Je Na’s enemies, determined to bring her down. On Je Na’s side, her once dismissive attitude toward Jin Uk begins to soften and the two form a reluctant yet increasingly cooperative alliance. In a tangled web of betrayal, manipulation, and shifting loyalties, no one can tell who is truly a friend or an enemy.

After Hae In's death, the fragile balance between the characters starts to collapse. Yul Hui pressures Hye In to expose Je Na with a lie during her engagement ceremony with Jin Uk, using a video as leverage. As the fateful day approaches, Hye In stands at a crossroads. With everyone watching, Hye In’s next move could change everything. Will she betray and bring Je Na down, or choose the truth?

Hye In interrogates Sa Rang about whether he is actually Black Dog. Ultimately, Sa Rang confesses the truth regarding Oh Si Eun’s cellphone. After hearing Sa Rang’s account, Hye In is convinced that the person who took Si Eun’s phone is the one who pushed Si Eun. Meanwhile, rumours begin to spread about Baek Je Na’s drug abuse.