Y, the Last Man: Girl on girl

Dr. Mann is finally able to isolate the source of Yorick and Ampersand's immunity. Unfortunately, that source is withing Ampersand's body, which was last seen disappearing under the arm of a mysterious Japanese mercenary. Now, accompanied by 355 and Dr. Mann, the last man on Earth has embarked on a new and even more hazardous journey -- following Ampersand's trail across the Pacific, where danger threatens from below as well as above the waves.