In 1996, treasure hunter Brock Lovett and his team aboard the research vessel Keldysh search the wreck of RMS Titanic for a necklace with a rare diamond, the Heart of the Ocean. They recover a safe containing a drawing of a young woman wearing only the necklace. The drawing is dated April 14, 1912, the day Titanic struck the iceberg.[Note 1] Rose Dawson Calvert, claiming to be the person in the drawing, visits Lovett and tells of her experiences aboard Titanic.