- The team investigates a series of arson in a yacht tied with a dead body.
- Their initial suspect is a guy whose old-school Hawaiian but later on they learn that he's been working with the FBI.
- Back to square one, the HPD finally excavated something substantial from two fishermen.
- One of the fishermen was busted for theft and drugs. Thus, giving the HPD strong evidence to arrest him.
Source: Spoilers Guide - Hawaii Five-0