The Chuseok special film 'The Devil Has Moved In' will air on tvN on September 26 at 10:20 a.m. Directed by Lee Sang-geun and starring Lim Yoon-ah and Ahn Bo-hyun, the film uses comedy to portray the relationship between a woman with a special secret and the man who comes to watch over her.

■ 2 A.M.: The Secret of the Woman Downstairs

What if the neighbor you are drawn to has a completely different side after dark? Gil-gu (played by Ahn Bo-hyun), who quit his job and stays at home, finds himself attracted to Sun-ji (played by Lim Yoon-ah), who has just moved in downstairs. However, as he gets closer to Sun-ji, he learns something unexpected. Although Sun-ji seems like an ordinary neighbor by day, she wakes up as a devil at 2 a.m.

■ Nightly Caregiving Job Brings Laughter and Tension

Gil-gu takes on a part-time job caring for Sun-ji every night. Though it means staying by the side of the person he likes, dealing with Sun-ji's transformed self cannot be solved by feelings alone. Gil-gu's plight of having to respond to Sun-ji's behavior adds laughter and tension to their encounters.

■ Lim Yoon-ah's 'Two Faces' and Her Chemistry with Ahn Bo-hyun Are Key Points to Watch

Lim Yoon-ah plays Sun-ji's contrasting sides. She shows the two faces of a single character, drawing a distinction between her calm, shy demeanor and her appearance after the devil awakens. Ahn Bo-hyun portrays Gil-gu, who maintains his relationship with Sun-ji even after learning her secret.

The key point to watch is how the two actors' chemistry shifts with Sun-ji's transformations. As a relationship that began with interest in a neighbor develops into one sharing an unfamiliar secret, the film leaves viewers curious about how the two will come to accept each other.