In 1912, a large ship called the Titanic sank forever in the deepest part of the Atlantic Ocean. In 1997, a movie called "Titanic" was born, earning enough tears to drown another ship. In 2012, the ship was renovated and put on a 3D coat to return to the big screen, consolidating the film's enduring legendary status. However, for the annihilation of the ship, the most sad is never the audience, but a man hiding behind the scenes, nearly 60-year-old man-film director James Cameron (James Cameron). Cameron's fate with the Titanic is not over, and this time, he led his cutting-edge team to re-explore the root causes of the ship's sinking in physics, mathematics, history and art history, and even restore the trajectory of each piece of debris. With repeated calculations and deductions, the director, who has created countless miracles, is also having a long farewell to this ship that has moved hundreds of millions of audiences.