Captain America fights Hydra and confronts the deadly Hydra agent the Winter Soldier, who turns out to be [spoiler].
It is, mostly, an exciting movie. It's also very loud and very violent. "Very violent" is a thing that doesn't really work for me. While this is partly a moral thing, and partly an aesthetic thing, it's also to a significant degree a question of how much and what kind of overstimulation my nerves can take when I am not having a good day emotionally and go to the movies to distract myself.
But this is an exciting movie with lots of neat superhero stuff. I have to admit I did not really warm to Captain America, who seemed very contained and distant, but it is an exciting movie that gets the adrenaline pumping.
The level of violence was too high for me to fully enjoy the Neat Superhero Stuff, though.
Overall, not really my cup of tea.