On the hottest day on record in Hong Kong – when the temperature nudged 37 degrees Celsius (99 degrees Fahrenheit) – contemporary art’s best-known orchestrator of angst found herself forcing her way through the crowd at a former prison compound. This was not the frosty, theatrically sullen Anne Imhof often seen in magazine shoots and society pages. Dressed in her customary black, she appeared not like the enigmatic art-world diva whom Marina Abramović picked as one of the most influential women...