In a future where reality has been augmented and biology itself has been hacked, the world's food supply is genetically modified, superior, and vulnerable. When gene mapper Hayashida discovers that his custom rice plant has experienced a dysgenic collapse, he suspects sabotage. Hayashida travels Asia to find himself in Ho Chi Minh City with hired-gun hacker Kitamura at his side - and in mortal danger - as he pushes ever nearer to the heart of the mystery.