After finding Bucky Barnes, HYDRA tracks down Captain America through a locator hidden on the aircraft. Both are wiped and utilized as assets. It is soon discovered that if the two are in the company of each other, they do not fight to remember their pasts. The Winter Soldier and the Commander work together. There is a natural comradeship between them, though neither know why. Together, they are unstoppable.
However, the serum adapts. The Commander and the Winter Soldier are sent out to complete a simple contract: Kill Tony Stark. But the mission’s face is so similar to a shadow of the past. They fail the objective. The Commander and the Winter Soldier are haunted by the memories of another life, still brothers in arms, always, but fighting for a different side. HYDRA is not what it claims to be. The Commander begs his comrade to escape with him and inexplicably says, “I’ll be with you, ‘til the end of the line.” He does not know what it means, but he knows it means something. But the Winter Soldier refuses, and tries to ignore the nausea that thrums through his veins as he watches the man he has followed through infinite lifetimes disappear into the darkness of the night without him.
A new contract arrives.
The Commander has been compromised.
And the Winter Soldier must take him out.