The daughter of a prominent samurai, Mariko has long known her place. She may be an accomplished alchemist, whose cunning rivals that of her twin brother Kenshin, but because she is not a boy, her future has always been out of her hands.

"In addition to training to be a super hero, Katana also follows the noble warrior traditions of the Samurai. Now an unknown source has given her the responsibility of guarding a hundred ancient Samurai swords--but why her, and for what purpose? With the help of Wonder Woman, Supergirl, Miss Martian, and some of her other super friends, she intends to find out"--

Joe, Fred, and Sam are transported to seventeenth century Japan where they infuriate a Samurai warrior, encounter their great-grandaughters, and save their lives by reciting an ancient form of poetry.

Under the cover of darkness, a band of ninja thieves has stolen some of Japan's most priceless treasures, including an ancient samurai sword. Can Secret Agent Jack Stalwart take on the gang before the treasures are lost forever?