While the Hardy Boys are in Hawaii for a surfing contest (and get interviewed by Fred Hemmings for ABC's Wide World of Sports, hang out with some cute girls), their hotel room is gets burgled and they're matching wits with a ring of thieves.. Discovering that they're not the only victims, the two detectives volunteer to help the Hawaiian police apprehend the burglars.
But we, the viewers, are kept under the dark about their undercover work, and I was confused that after they reported to the police of their loss they go and burgle someone's room. It adds a bit of tension, gains some interest apart from the scenic appeal of Hawaii, surf, and cute girls. It's a fun episode with some good one liners from Joe, who gets to sing too.