In April 2012, 100 years after the sinking of the
RMS Titanic, a new, similar-looking luxury cruise liner named the SS
Titanic II is christened. It then embarks on her maiden voyage using the same route the
Titanic took 100 years before in reverse direction (from
New York City to
Southampton,
England).
During the Atlantic crossing,
the effects of global warming cause the Helheim glacier in Greenland to collapse, creating a 800mph tsunami that sends an iceberg crashing into the
Titanic II. The entire starboard side of the ship is crushed and immense pressure is put on the liner's turbines. As people struggle against the rising waters and run for the submarine-shaped lifeboats, the turbines eventually explode, causing an immense fire inside the listing and sinking vessel.
Hours later,
another tsunami, this one more powerful and faster than the speed of sound, caused by a second collapse of the Helheim glacier hits the liner, flipping it upside-down and drowning the people still on board and killing all the passengers in the
lifeboats. With most of the ship flooded, the
Titanic II finally sinks.
The protagonists, ship owner Hayden Walsh and nurses Amy Maine and Kelly Wade, survive, having stayed aboard the ship instead of going for the lifeboats as Amy's father, U.S. Coast Guard Captain James Maine, had ordered. Kelly is later killed when a very heavy door crushes her torso while she is trying to make it through and the ship's diving facility
only has one oxygen tank, which Hayden gives to Amy. Before sacrificing his life for her, Hayden kisses Amy and with his last words tells her to resuscitate him should he drown before they are rescued. Captain Maine rescues them both, but Hayden has drowned by the time Maine reaches the pair. Despite his dying wish of being resuscitated, once they are in the emergency rescue raft, Amy attempts to save Hayden's life but he wasn't able to be resuscitated, leaving Amy and an unknown number of injured passengers who Hayden ordered his helicopter to take earlier in the film, as the only known survivors of the disaster.