Episode 10 of Miss Night and Day picks up the thrilling investigation into
Baek Cheol-kyu and his Hwadong Medical Center. Determined to uncover his
secrets, the unlikely trio of Ji-Ung, Mi-Jin (as Im Sun), and Byung-Deok embark
on a clandestine mission to gather evidence.
Their covert operation within the medical center yields promising results. Ji-Ung discovers a suspicious medication in the basement storage, while Byung-Deok stumbles upon a concerningly large stockpile of fentanyl in the pharmacy. Meanwhile, Im Sun manages to snag Baek's razor for a crucial drug test. Barely escaping detection, they return with their findings, but a new question arises: why does Baek possess Im Sun's blood test from years ago?
As the investigation progresses, fear creeps in. Im Sun worries for her safety upon learning of Baek's sudden leave of absence. Meanwhile, Baek, alerted by the missing razor and CCTV footage, realizes Im Sun was in his office.
A parallel story unfolds, revealing a blossoming connection between Im Sun and Ko Won. While searching for a missing cat, Im Sun enlists Ko Won's help through social media. Their teamwork sparks a budding friendship, much to the obliviousness of Ji-Ung, who overhears a male voice during a call with Mi-Jin (as Im Sun) and becomes consumed by jealousy.
Torn between his feelings and ethical boundaries, Ji-Ung refrains from using the GPS tracker on Mi-Jin. This internal conflict further fuels his frustration when Ko Won picks up Mi-Jin's phone instead. Later, Ji-Ung witnesses Ko Won dropping Mi-Jin off after their evening search.
The investigation takes a dramatic turn as the team receives intel on the relocation of drugs from the club. Ji-Ung and Byung-Deok embark on a grueling trek to Obongsan Mountain to recover the hidden stash. However, the treacherous terrain forces them to seek help from Im Sun, a seasoned mountain climber who previously reached the peak in record time.
This revelation unveils a hidden talent of Im Sun, showcasing her strength and resilience. Despite Byung-Deok's initial skepticism, he and Ji-Ung successfully locate the drugs with Im Sun's assistance. The episode concludes with Ji-Ung, exhausted from the mountain climb, returning alone while Im Sun has already descended.
Jealousy rears its head once more as Byung-Deok witnesses Im Sun and Ko Won together. He attempts to warn Ko Won about the age difference but ends up inebriated. Ji-Ung arrives to pick them both up, and a tense conversation ensues between him and Ko Won regarding their relationship with Mi-Jin.
Back home, Mi-Jin is disappointed by Ji-Ung's missed call. Their strained communication and unspoken feelings lead to another misunderstanding. As Mi-Jin returns to give Ji-Ung a forgotten umbrella, she finds herself entangled in a confession from Ko Won. This dramatic scene reaches a fever pitch when Ji-Ung unexpectedly returns and witnesses the moment, leaving the viewers hanging with a cliffhanger ending.
Episode 10 of Miss Night and Day masterfully weaves together suspense, emerging love triangles, and the relentless pursuit of justice. As the investigation intensifies, secrets are unearthed, and hidden talents are revealed. With Mi-Jin caught between two suitors and Ji-Ung wrestling with his emotions, the stage is set for a dramatic confrontation in the next episode.