堡垒：戴安娜：Milan,2030;whereonlyeightyearsearliertheindependentglobalspyagencyCitadelwaswipedoutbyManticore,thepowerfulenemysyndicatethatmanipulatestheworldfromtheshadows.Sincethen,DianaCavalieri(whoisanundercoverCitadelagent)isalone,trappedbehindenemylinesasamoleinManticore.WhenDianafinallyseesawayoutandthechancetodisappearforever,heronlyoptionistotrustthemostunexpectedally,EdoZani,heirofManticoreItaly,sontotheheadoftheevilsyndicate’sItalianunit;whojustsohappenstobevyingforManticore’sleadershipagainstotherEuropeanfamilies.