 A treasure hunter seeks for a diamond in the ruins of the Titanic. He finds a paint of a beautiful woman wearing the diamond which connect him with Rose Dawson, an old woman claiming to be the woman in the paint. She tells her story, about the sink of the Titanic. She tells how she was a 17 years old girl, and how she fall in love with a poor man named Jack Dawson. She describes, by flashbacks, her journey from Southhempton to New York, the time she spent aboard the "unsinkable ship", and the last hours of the Titanic.