Second Sister (2025)
Find the murderer hiding in the network
Overview
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.
Second Sister Official Trailer
Where to Watch Second Sister
Second Sister isn't on streaming services in United States right now. Check back soon. We update this daily.
Second Sister Cast
Kim Min-gue
Kang Seo-ha
- S
Seong Hee-hyeon
- P
Park Dong-hyeok
Second Sister: Quick Answers
Where can I watch Second Sister?
Second Sister is not on streaming services in the US yet.
When was Second Sister released?
Second Sister came out on December 17, 2025.
Is Second Sister worth watching?
Second Sister holds a 4.5/10 average from 4 TMDB user ratings. Reactions are mixed, so check the trailer first.
How long is Second Sister?
Second Sister runs 90 minutes (1h 30m).
