"The Fearful Secret of Bucky Barnes!"
As the vanquished, would-be tyrant Baron Strucker is led away by local police, he utters a prophetic warning to Captain America, who's just been reunited with his long-lost partner in crimefighting - Bucky Barnes. "You are not safe yet, Avenger!" Remember those words, Captain.
Pressmen the country-wide lap up the astonishing news. Bucky Barnes miraculously survived the end of WWII, just as Steve Rogers had, but has been suffering amnesia all this time.
The announcement is greeted with equal measures of joy and sorrow by varied friends of the red, white and blue hero.
Unfolding events are watched with voyeuristic interest on a remote island populated by A.I.M. and their rebellious creation, M.O.D.O.K. In that grand super-villain tradition, M.O.D.O.K. reveals to his underlings his intricate plan to usurp world control.
The plan includes manipulating Doctor Doom as well as Strucker. Doom was goaded into constructing a lifelike facsimile of Bucky Barnes. While Strucker had the thought of finding the Barnes doppelganger mentally implanted by M.O.D.O.K.
With all those myriad threads in place M.O.D.O.K. chooses to implement his attack on Captain America, commencing..... now!
Cap is abruptly attacked by his supposed best friend. Even though he can't bring himself to fight back, Steve must somehow save himself and stop the aberrant actions of Bucky.