On the unforgiving Bering Sea, the 110-foot fishing boat Destination suddenly vanishes. After a three-day air and sea search finds nothing, the captain and all five crew are presumed dead. It's the worst accident in the Alaska crabbing industry in more than a decade. Investigators with the National Transportation Safety Board and U.S. Coast Guard race to find out what doomed the ship and its experienced crew. What they uncover is a string of clues leading up to the final moments of the disaster that would leave a community stunned.

On Scotland's treacherous River Clyde, three tugboats and a massive bulk carrier are blinded by fog during a 17-mile journey from Greenock to Glasgow. When one tugboat is apparently grounded, the other tugs carefully guide the cargo ship safely to its destination...but their relief will be short-lived. Witness the 2007 sinking of the Flying Phantom and follow the Marine Accident Investigation Branch as they race to discover if the disaster was cause by a collision, human error, or by a malfunction that may put other tugboat crews in danger?