This film basically is about time travel, about how a researcher tries to save her child from various circumstances by travelling back to the amount of time permitted.
This does sound familiar, however, one thing to note is how there were a few seemingly random scenes at the beginning of the film which would remain unexplained until near the end of the film. Thus, it will be kinda mysterious and confusing here and there.
What I find this film lacking is how it presents the scenarios. There were a few scenes which were so incredibly impossible or careless that I really find it hard that this is catered to adults. Thus, the story line becomes boring and predictable, and I kind of lost interest halfway the show. However, there were also quite a few unexpected twists which made the plot line interesting.
In conclusion, this is a film that you should take a pinch of salt with when watching because even for a sci-fi film, it doesn't look very realistic. Watch for the action, not the logic.