I had issues with the beginning of the story, I was unconvinced by the story. Bucky is dead but not dead. He's entangled with the Black Widow, somehow, unconvincing, as I said.

But the story unfolds, and you have to be a bit patient, because it becomes better. The full arc is built from three consecutive stories, „The Longest Winter”, „Broken Arrow” and „Black Widow Hunt”, but I can't imagine how one could read any of the stories separate. The point is that Bucky and Black Widow are hunting for three sleeper agents (similar tu Barnes) that were ready to be mind controlled. While the first two are relatively easily disposed of, the third goes rogue, and the two are set to find him.

I will not give spoilers; I was displeased with the first part of the story, I found it shallow and hard to understand at times. And the acrobatics, man, they seem quite pointless at times. But after the introduction is out of the way, it gets a lot better, redeeming itself for the lousy beginnings.

I definitely recommend the complete collection; the story broken into volumes makes little sense.