“Find the murderer hiding in the network”
Watch Second Sister for Free in 123Movies
Second Sister (2025) – Official Trailer, Cast & Details
Second Sister at a Glance
Second Sister is a 2025 thriller and crime film from director Shin Jai-ho, featuring Kim Min-gue, Kang Seo-ha and Seong Hee-hyeon. It has a runtime of 1 hour 30 minutes and came out on December 17, 2025. Second Sister holds an average TMDB user score of 4.5/10 from 4 votes.
Watch the official Second Sister trailer for free in 123Movies below.
1080p HD • Free YouTube Stream
Storyline & Synopsis
High school student 'Ji-eun' was the victim of the crime, but distorted online posts and malicious comments made her into the perpetrator in the public eye, driving her to take her own life. Her sister 'So-eun' finds detective 'Jun-kyung' to uncover the truth behind her sister's unfair death, and he begins hunting down a suspect in cyberspace. As clues are revealed one by one, the case grows from a simple rumor into a complex web of truth involving anonymous accounts.
Where “Second Sister” Fits in the 123Movies Catalog
Frequently Asked Questions About Second Sister
What is the release date of Second Sister?
Second Sister was released on December 17, 2025.
How long is Second Sister?
Second Sister runs 1 hour 30 minutes (90 minutes).
Who is in the cast of Second Sister?
Second Sister stars Kim Min-gue, Kang Seo-ha, Seong Hee-hyeon and Park Dong-hyeok.
Who directed Second Sister?
Second Sister was directed by Shin Jai-ho. The screenplay is credited to Shin Jai-ho.
What kind of movie is Second Sister?
Second Sister is listed on TMDB as a mix of thriller and crime.
What is the TMDB score of Second Sister?
On TMDB it has an average user score of 4.5/10 from 4 votes.
Where can I watch the Second Sister trailer?
You can watch the official trailer for Second Sister, "Second Sister | tvN Movies", for free on this 123Movies page. It is embedded from YouTube.
What should I watch if I liked Second Sister?
Movies TMDB recommends alongside Second Sister include The Seven-Ups (1973), The Chronicles of Evil (2015), The Pelican Brief (1993), The Chase (2017) and Indemnity (2022).
Can I stream the full movie of Second Sister on 123Movies?
No. 123Movies only shows official trailers and title information. Full movies are not hosted or linked on this site.
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