Robin Lee’s box office phenomenon Four Trails takes place over 72 hours, 298 kilometres, and more than 14,500 metres of elevation. A handful of ultra runners attempt Hong Kong’s most punishing feat: conquering all four of its legendary hiking trails in a single push. The rules are brutal – no trekking poles, no music and no sleep – only the raw test of body and will. With a success rate of barely 6%, every finisher becomes part of local legend.