For more than 50 years, the Soviets employed an undercover agent, an unstoppable and untraceable killer known as the Winter Soldier, to assassinate key political figures in the West. His suspected identity? Bucky Barnes, Captain America's onetime partner, thought to have been murdered in the closing days of World War II. Now, the Winter Soldier is back, working under the command of the ruthless General Lukin, who has obtained a functional Cosmic Cube, a weapon of limitless power which can bend reality itself. Vowing to end Lukin's reign of terror and destruction, Captain America relentlessly tracks the Cube's trail only to find himself face-to-face with the Winter Soldier. Will Cap be forced to battle his resurrected partner so soon after finally learning the astonishing truth?