For me this movie is one of the best movies released in year 2021. Synapse is by far one of the best online movies I've ever watched. Synapse got everything what a movie should have, I'm sure everyone who watch full movie will enjoy it. Anyway, Sci-Fi may boast of one of the biggest numbers of good movies. What determines the phenomenon of this movie? It's realism, taking care of psychological probability?. It's a movie for everyone, I'm sure you'll like it after watching.