Black Butler: Book of the Atlantic

When Ciel hears that there has rumors of a hospital raising the dead he asks Sebastian to investigate. They learn that there is a secret society behind it and they are meeting on a luxury cruise liner known as Campania. Coincidentally, it is the same ship that his Fiancée Lizzy had invited him to go on with her family. Ciel, Sebastian, and Snake successfully get on and infiltrate the meeting. However, what happens next was unexpected to everyone. The technology used doesn't bring corpses back to life, but instead turns them into zombies. Pretty soon the entire cruise ship is overrun with zombies. Will Everyone be able to make it out alive?

I wasn't quite sure if Black Butler: Book of Murder was necessary to watch, But Black Butler: Book of the Atlantic made it clear that it is. The reason I was led to believe this is because it is the only season of black butler you can't find on Crunchyroll. Something that I realized as I was watching the movie was that the characters acted overly surprised when they find out a secret. However, this same secret was revealed in the 2nd cour of season 1. It was then that I remembered that the 2nd half of season 1 and all of season 2 were not cannon. I kind of wish I had known about the order before I started watching it. I was also a little disappointed that Finny, Mey-rin, and Baldroy are only a part of the movie for the first minute or so. Overall, the movie was good and should definitely be watched after Black Butler: Book of Murder.