The Punisher is taken into custody by Black Widow, a S.H.I.E.L.D. agent and Avenger, after interfering with a top secret mission. They are sent on a mission to stop Leviathan, a global terrorist organization that plans to sell stolen S.H.I.E.L.D. technology to the highest bidder.

Avengers Confidential: Black Widow & Punisher
A notorious terrorist group, Leviathan, seeks to profit from pilfered S.H.I.E.L.D. technology by auctioning it off to the highest bidder, prompting a collaborative effort between the Punisher and Black Widow to thwart their plans.