Steve Rogers (Captain America) teams with Dum-Dum Dugan as they investigate the past and revisit WWII-era secrets. Meanwhile, Nick Fury interrogates Baron von Strücker in a maximum security prison, but Strücker escapes and sets his vengeance in motion. Cap uncovers his war-era footlocker — items from his service, including his triangular shield — and confronts new revelations about his own origin.