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Their domestic bliss begins to unravel when Sohui attends a high school reunion where old friends spill secrets, including the shocking tale of Sarah, a former classmate who murdered her husband after discovering infidelity. As she returns home after the reunion, Sohui stumbles upon a missed call on Mangil's phone from an unknown number, leading her down a treacherous path of suspicion regarding Mangil's fidelity.

The Seeds of Doubt

Sohui’s insecurities grow stronger when she discovers messages hinting at a secret meeting connected to Mangil. Distrust consumes her as she researches signs of infidelity. Her belief that Mangil might be cheating deepens when he concocts an elaborate lie about attending a funeral on a date she had planned.