For artist Dan Bellamy and his new bride Elaine, a trip on the world's biggest, newest cruise ship represents more than just the honeymoon of a lifetime: it is also a celebration of the progress Dan has made toward beating the agoraphobia that has plagued him since he suffered a horrific knife attack two years earlier.
The ship is a perfect floating paradise, but when Dan spots what he thinks is a body being thrown overboard, he begins to suspect that not everybody aboard the Oceanus is there for a vacation.
Soon, Dan will discover that there are some things worse than murder, and the body he saw is just the beginning. Because something is coming for the passengers on the Oceanus.