Shocking secrets from the Invisible Woman's past are revealed! Years ago, Susan Storm Richards undertook an espionage mission for S.H.I.E.L.D. — and now it's up to her to save her former partner from death at the hands of international terrorists! The Invisible Woman must form an unlikely — and uneasy — alliance with another heroine who knows a thing or two about staying hidden: the Black Widow! Together the two will comb the lush palaces and back alleys of the seedy island nation of Madripoor — but what they discover will shake the Invisible Woman to the core and turn her mission upside down!