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Enter the world of the iconic and deadly spy Avenger Natasha Romanoff. This story tells of her mission to rescue Ava Orlova, a teenager of Russian origin who has been the victim of various military experiments. Suddenly, children from all over Eastern Europe begin to disappear, and everything points to Natasha's former teacher being behind it all. Ava may be the key to defeating him, although both she and Natasha must first unravel the mysteries that surround their respective pasts.