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