It’s September 1, 1985. Researchers led by oceanographer Robert Ballard have been scouring the seabed at a depth of some 12,000 feet via the camera of the remotely controlled Argo for a week. They’re beginning to lose hope that they’ll find their quarry, the wreck of RMS Titanic. But then, early in the morning they begin to see traces of debris. Suddenly, they know they’re close.