Hobbs, a miner from the Australian Outback, comes to Hawaii to sell opals he has dug up. Hobbs' secret is that he is actually carrying a much larger and immensely more valuable cache, which he smuggled through customs after showing them his display items. When he negotiates with a jeweler, a robber bursts in and steals all of the gems. Hobbs tells Five-O about the theft of his small items, leaving out the bigger picture. He suspects (correctly) that the robbery was an inside job pulled off by associates of the jewelry-store owner. Hobbs finds the holdup man and kills him, only to find out that the jewels in the man's possession aren't Hobbs'. He launches a violent quest to find the top-grade jewels before Five-O does.
—Peter Harris