Horizon meets the two men who uncovered Stuxnet, the pioneers of ultra-paranoid computing, a white-hat hacker who showed out how to hac k into stand alone cash machines, and explains how companies test resilience.
After an attack renders her blind, Ellen Ashland withdraws from the world to recover. But soon she plunges into paranoia, unable to convince anyone that her assailant has returned to terrorize her by hiding in plain sight.