在一个本应平和的日子里,美国队长(罗杰·克莱格·史密斯 Roger Craig Smith 配音)和钢铁侠(Adrian Pasdar 配音)两个好友彼此角力,互不服输,但彼此的友情也在这一过程中得到见证。另一方面,野心勃勃的红骷髅(Liam O'Brien 配音)绝不甘心此前的败绩,他雇来掌握了复仇者联盟超级英雄们全部技能的模仿大师(Clancy Brown 配音),发誓要彻底摧毁美国队长和钢铁侠这两个难缠的对手。按照之前的计划,一队九头蛇士兵入侵斯塔克的飞船,盗走了威力强大的斥力加农炮;与此同时,美国队长遭遇模仿大师,最终成为对方的俘虏,面临着被红骷髅转化的厄运。 在红骷髅的阴谋驱使下,一对昔日好友成为了正邪死敌……
Plot Summary:While Tony Stark and Steve Rogers playfully challenge each other on the merits of their own ways of problem solving, things take their own hands into the contest. That comes in the form of the Taskmaster who is sent by the Red Skull to capture Stark's technology and abduct Rogers himself. With Taskmaster successful in both objectives, The Red Skull puts his scheme of world domination into operation with Rogers being the key to that. Now, Stark must find his friend and together, they must stop the Skull in their own ways and also each others'.