"Sync" has one of the best plot twists I've ever seen.
You have to watch it until the last second and analyze its ending.
An extremely intelligent and deceptive film, watch it if possible without knowing anything: because the plot twist is practically the entire film.
If you didn't understand it, go look for explanations or watch it again. It is a highly recommended experience for any horror film fan.
A surprising film in its ending. Not suitable for casual audiences or impatient audiences. It should be more widely spread outside of India, I haven't seen many reviews about this great film.