In the 18th episode of the drama series 'City's Other Side', Tien shares his growing concerns with Khuê regarding Tuyet Lan's intentions. He believes that Tuyet Lan is scheming to create a rift between Khuê and Cương, which has been evident since Tuyet Lan joined their group.

The episode begins with Tuyet Lan's mother questioning her about receiving gifts when it is not her birthday. Tuyet Lan, keeping her plans hidden, claims the gifts are from her old classmates. Her mother expresses her disappointment, emphasizing that she has always been there for Tuyet Lan, yet the daughter only confides in her father and late brother.

As tensions escalate, Khuê remains upset with Cương after their recent altercation, which Tuyet Lan seems to relish. Tien observes the situation closely and confronts Khuê during recess, articulating his suspicions about Tuyet Lan's manipulative behavior. He recalls how Tuyet Lan appeared satisfied during Khuê and Cương's previous conflicts, suggesting that her actions are deliberate attempts to drive a wedge between them.

Tien's observations lead Khuê to reconsider her views on Tuyet Lan, especially regarding her knowledge of Khuê's brother's death. The episode is set to air tonight at 9 PM on VTV1, promising to unravel more of Tuyet Lan's secrets and the impact on her relationships.