The current Avengers Goliath, Vision, Wasp and Yellowjacket, together with Iron Man and Thor are in the SHIELD helicarrier to test a new substance created by Dr Maclain. Adamantium proves resistant to attacks from Thor's hammer, Iron Man's repulsor rays and Goliath's fist. It can only be affected by a molecular rearranger.
Vision is acting strangely. Later he breaks into the helicarrier and steals the adamantium.
Back at Avengers Mansion a computer-controlled training session almost proves fatal for Iron Man. Then Vision appears and attacks them. But he is only keeping them busy while his creator Ultron-5 uses the mansion's computers to build himself a new adamantium body as Ultron-6.