Spinning out of Captain America, Britain's premiere super hero has mere hours to prevent multiple terrorist attacks on London by an army of super-villains! Union Jack leads Sabra and the new Arabian Knight into battle! But when his boss at MI5 risks innocent lives to bring down the enemy, Union Jack faces a tough choice - and the fate of London itself rests on his decision. Don't miss the book that redefines Union Jack for the 21st century, with stunning pencils by fan-favorite Captain America artist Mike Perkins! Guest-starring Sabra, Arabian Knight, Batroc the Leaper, Machette, Zaran, Boomerang, Crossfire, Jack O'lantern, Shockwave and more!