Perfect movie if you decide not to use your brain for two hours.

The Call has a lot of pros, not gonna lie. The acting is amazing, especially from Jeon Jong Seo. Her character is truly the best part of the whole production. You end up loving and hating her at the same time. Jong Seo's portrayal of the initial vulnerability that moves into the direction of desperation and then madness is an intriguing ride.

Park Shin Hye is good. As good as in any other production she was in the past few years, as she is playing exactly the same character. Kind of strong and driven to survive, but not really. Sometimes making smart choices, but that are built on a chain of dumbness. There isn't anything fresh or interesting about her.

The other characters are barely there, only serving the purpose of moving the plot forward or being an external motivation for the two main characters.

The visuals - truly stunning. That's the part of the production that shows a lot of work and planning. The moments when two worlds are colliding and affecting each other was done in an exciting and beautiful way.

So what is the problem?
I'm fairly certain that Lee Chung Hyun did not have a storyboard for this project and he could not decide what exactly are the rules of the time. He presents a linear concept of time (compared to "alternative universes"), when past events affect future events. One reality, but two different points in time. But the way the movie presented the concept was as if the two timelines were parallel and progressing the same way.

Currently happening event in the past affects the currently happening event in the present, but we don't see how the past plays and affects the present in between these events, as if the time between these two events does not exist. The past is the past. Seo Yeon should have access to all the information about the events that happened, not just the ones currently happening in the parallel timeline. Not to mention the fact Seo Yeon had no memories of the past events that affected her. Why?

All events in the movie happened in the linear way, except for the ending. Which was also not explained. The plot twist just opened the door to so many plot holes. If you could call the past at any given time on that timeline, why didn't Seo Yeon use it to her advantage?

The more I think about the way the plot was structured and the time connection explained, the more I get annoyed. It truly looks as if no time was put into making sure the events follow any line of logic. On the surface, it's the basic "action-reaction" deal. But when you start asking questions, you see that time travel/connection plot lines cannot follow this simple logic, because that's what makes them illogical. As time is not that simple...

Anyway, I can see why people enjoyed the movie. It was entertaining for most parts even though quite predictable. If you won't try to understand the logic behind the events or the rules of the time aspects, you will like it. So, the piece of advice: put your brain on the shelf before starting it.