All is not well at SymaxCorp. The work is piled high, people are toiling overnight to meet deadlines, and the supervisors are keeping their beady eyes on everyone. But staff are complaining of feeling sick, and the last health and safety officer disappeared one evening never to be seen again. It's down to new boy Ben, together with temp Miranda, kick-boxing Meera and over-weight June to try and get to the bottom of the problem. As colleagues are progressively transformed into mindless, blood-crazed zombies.