TheAvengersgathertocelebratetheirlatestvictory,buttheircelebrationisquicklyinterruptedbythemysteriousdisappearanceofBlackWidow’sfather,RedGuardian.AstheAvengersinvestigate,theydiscoverthatRedGuardianisn’ttheonlyonemissingwhentheymeetadangerousnewfoequiteunlikeanythingthey’veeverencounteredbefore.