One thing I have always loved about Sci-Fi is how they can flesh out a thought experiment. The how/why something happens is secondary to what chain of events occurs when you start with a catalyzing thought/event.
In this case the the thought experiment is what would happen if everything that came within 50ft of a person dropped dead instantly. How would that person react, how would they figure it out? That was the portion of the story that I found compelling and interesting. The second part of the thought experiment, is what if there is another person who renders his powers safe.
The second aspect of the story, is that person in question, wakes up with amnesia. He can't remember who he is or anything about his life. There is also another person who also can't remember her life, and happened to be in the car wreck with him right before he woke up.
The part I found less compelling was the backstory of the two main characters. It was an odd mystery thriller added on top, that was kind of at odds with the characters' arc. It also kind of made the ending seem morally OK (perhaps even blah), instead of poignant and/or tragic. For many viewers, I assume, the added layer may make it more enticing, so I can't say it was bad, just not for me.
The ending did leave some unanswered questions, but that is to be expected and even desired for movies like this. Overall the movie was very well done, and worth watching.
