The issue features numerous callbacks to Captain America's 75-year-long history. Sharon Carter is by his side as the director-in-waiting of S.H.I.E.L.D. (Maria Hill is in the process of being tried for war crimes following the events of the
"Standoff" storyline). Rick Jones is serving out his sentence for his actions as the whistle-blower Whisperer by running tech and communications for Steve Rogers' field missions. Even two of Captain America's forgotten sidekicks from the '90s, Jack Flag and Free Spirit, are involved and serving as backup for the returned hero.
But the issue's end is where the major reveal takes place, and it potentially alters all of Captain America's history.
The team finally locates Baron Zemo, the former HYDRA lead that's been on the run since the end of "Standoff." Cap tracks Zemo to Bagalia and intercepts the villain's plane, foiling his attempts to escape with his prisoner Erik Selvig. But during their mid-flight altercation, Jack Flag interrupts the skirmish and knocks Zemo out cold. Cap then repays Jack by shoving him out of the plane, seemingly to his death. He then turns to the bound and gagged Selvig and says...