Tuesday, May 10, 2022 at 10:30 p.m. on KPBS TV + Thursday, May 12 at 9 p.m. on KPBS 2 / On Demand. On Honolulu's famous Waikiki Beach stand four large stones that represent a Hawaiian tradition of healing and gender diversity that is all but unknown to the millions of locals and tourists passing by. According to legend, the stones are a tribute to four mahu - people of dual male and female spirit - who brought the healing arts from Tahiti to Hawaii and used their spiritual power to cure disease.