''Dark Money: London's Dirty Secret'' pierced a world that is normally hidden from all but those who enjoy great wealth or great power: the world of financial secrecy. At a moment when public debate is dominated by inequality and tax evasion, the Financial Times turned a glaring spotlight on the City of London and explained its role in a global system of illicit finance that serves the kleptocrats, criminals and the super-rich. One of the most-read stories of the year on FT.com, Dark Money was a riveting narrative that exposed a system designed to look impenetrable to outsiders. The City's secrecy specialists spin webs of front companies, offshore accounts and dummy directors that allow tainted wealth to flow around the globe incognito. This system takes dirty money and makes it look clean. It creates a secret world whose existence is corrosive to the rest of society - a piggy bank for untouchable power.