With 11 sharks successfully caught, tagged and released, its time for Dr. Domeier to put his technology to the test. The expedition team embarks on its longest and most dangerous voyage yet, more than a thousand miles into the Pacific Ocean, to find their old friends. As they leave the marina, some of their sharks are already pinging in, luring them offshore. Weather, mechanical failures and fatigue are just a few of the obstacles looming ahead, but the rewards could be immense and include groundbreaking discoveries on this apex predator of the sea.