In 2036 epidermal programming is the chic thing among the fringe dwellers of the hacker underworld. And sentient tattoos travel on-line, perform tasks for their owners in Omnispace and can even be transferred from body to body in forbidden techno-pagan rituals. But these tattoos are contaminated with bio-software bugs that can wreak havoc - on the user and on the entire Net. And Mir, a particularly virulent bug, is running amok, destroying everything.