A woman who magically switches between her 20s and 50s lands an internship at the Prosecution Service, caught between two generations and a tough boss.
After failing her interview and falling for a scam, Lee Mi-jin falls into a well and finds herself transformed, leaving her desperate to find a cure.
Mi-jin begins work at the Prosecution Service as Lim Sun, running into Gye Ji-ung again. He later investigates a crime scene that leads to a wild chase.
Mi-jin's brief encounter with the killer aids Ji-ung in his efforts to find him. Sun becomes Ko Won's source of comfort during his struggles at work.
Sun reports to duty in Ji-ung's office, where she tackles every test thrown her way. Ji-ung prepares Mi-jin for the dangers she may face as a witness.
Ji-ung looks further into Ko Won's attacker after suspecting something bigger afoot. Sun gets scolded by Ji-ung over a mistake — shaking her confidence.
Mi-jin faces a crisis as she begins to transform into Sun in front of Ji-ung. Later, they make progress in a drug case after confronting violent youths.
Ji-ung questions Mi-jin while Ko Won investigates Sun, both suspecting something's off. Sun encounters a dilemma when she gets drunk at a work outing.
Ji-ung tracks a suspicious person working within his office. Mi-jin, attempting to look into Ji-ung's document, shares an intimate moment with him.
After Ji-ung reacts unexpectedly to Mi-jin's move, she avoids him out of sheer embarrassment. Ji-ung decides to investigate a suspect in his own way.
The investigation into the hospital yields suspicious evidence. Ji-ung begins to feel uncomfortable about Mi-jin and Ko Won's relationship.
Baek Cheol-gyu looks into the connection between Sun and Mi-jin. During a raid at the hospital, Sun finds herself in a dangerous predicament.
Sun finds herself in a panic to save herself from Baek Cheol-gyu. But she later implores him for help when she realizes they may have a shared history.
As their romance blossoms, Mi-jin and Ji-ung navigate their complex relationship. Cheol-gyu requests a meeting with Sun to assist her with her request.
After Mi-jin oversleeps, she faces her family and Ji-ung as Sun — having to confront her secret. But soon, she deduces the identity of the killer.
As Mi-jin tries to save her father, she finds herself in danger — forcing Ji-ung to spring into action to track her down before it's too late.
With nothing left to hide, Mi-jin contemplates her future. After she testifies in her attacker's case, Mi-jin and Ji-ung reconsider their relationship.
Complete episode guide for Miss Night and Day with detailed information about every season and episode including air dates, summaries, ratings, and streaming availability in Portugal.
This episode guide is organized by seasons, making it easy to track your viewing progress or find specific episodes. Use the episode information to plan your binge-watching sessions or catch up on missed episodes.