"Realistic" superhero film

Rating: 7/10 (26 February 2019)

Citizens question a lone survivor of a deadly train crash. How did he survive, and more miraculously, without any scars or broken bone? Is he more than human?
Yes. He is, indeed, a superhero. The film is a "realistic" portrayal of superheroes if, indeed, they truly exist. He doesn't fly or has no magical powers like the superheroes they portray in comics. Instead he is, as the title suggests, unbreakable.
It is very slow-paced and can be a little dull, but it is a good movie. Recommended.