Exploring the murky and fast-paced world of the hackers out to steal money and identities and wreak havoc with people's online lives, and the scientists who are joining forces to help defeat them.

Alex Gibney explores the phenomenon of Stuxnet, a self-replicating computer virus discovered in 2010 by international IT experts. Evidently commissioned by the US and Israeli governments, this malware was designed to specifically sabotage Iran’s nuclear programme. However, the complex computer worm ended up not only infecting its intended target but also spreading uncontrollably.