Dr. Allison Mann is finally able to isolate the source of Yorick Brown and his pet monkey's immunity to a plague that killed every other male mammal on Earth. The source is within the monkey who was taken by a Japanese mercenary. Yorick tracks the monkey across the Pacific facing danger from below and above the waves.
General Note
Volume numbering from spine.
"Originally published in single magazine form as Y: the last man 32-36"--T.p. verso.
"Suggested for mature readers"--Cover p. [4].
"Y, the last man created by Brian K. Vaughan and Pia Guerra.".