Dudes I just got an SNI while watching Titanic.
So it's alternate history. It's about a lookout (I think that's what they're called. They guys that watch for stuff on top of that perch thing. Sorry, don't know my ship parts) that is this poor American teen that was orphaned in London after he was separated from his family over there. He competes for the job on the Titanic and finally gets it. But as the Titanic's maiden voyage progresses (sorry, I'm kinda hyper right now. When I get hyper the quality of my diction vastly decreases) he records strange sightings in his diary, so strange that he decides to not even report them to the captain. This includes tremendous splashes in the distance and odd flashes of bright, multicolored lights in the water below.
Then, on the evening of April 15, 1912, one Frederick McGill is bitten by a small spiderlike being that had crawled up the side of the ship. In five minutes, Mr. McGill is dead. In another five, he has reanimated into a zombie. And so begins the demise of the RMS Titanic seen through the eyes of the lookout, witnessing the survivors scramble for the lifeboats and fightback a thousand undead. Realizing that he will freeze to death if he doesn't get out, he decides to risk traveling down the ladder to get some warmer clothes, food, and weapons. He nearly gets cornered, but narrowly survives the journey down the ladder. A few hours pass. Fires break out across the ship. The Titanic begins to sink, and the lookout will go down with it if he doesn't get off his perch and into a lifeboat.
And through all of this, something lurks in the water. Something huge, something smart. Something above him and all of humanity.