As a powerful hurricane rocks the grounds, Jeff's new fishing tactic leads the crew into shark-infested waters. When Johnathan reaches out to an old friend for help, Josh discovers a new lead in the mystery of his father's time in Hawaii decades ago.

As Josh delivers the team's first fishing milestone, an unexpected turn lands him on the no-fly list back to Hawaii. Taking the reins from Seattle, Josh sends Casey and Jeff on a dangerous channel crossing to hunt for Hawaii's "Deep Seven" in Oahu.