Z Storm (Chinese: Z風暴) is a 2014 Hong Kong action thriller film directed by David Lam, and starring Louis Koo, Gordon Lam and Dada Chan. The plot revolves around Hong Kong's Independent Commission Against Corruption (ICAC) and its investigation of a charity fund that has become involved in a Madoff-style ponzi scheme. Co-produced by Pegasus Motion Pictures, Sil-Metropole Organisation and LeVision Pictures, it is the first installment in a pentalogy, succeeded by S Storm (2016), L Storm (2018), P Storm (2019) and G Storm (2021). ()