"All Gloryanna Griffin needs is a full-ride scholarship to finish her master's degree in marine biology in order to pursue her dream of saving the ocean. However, to be a serious contender for the money, she needs to publish in a prestigious magazine. A research dive off the Olympic Peninsula is a dangerous proposition but one that just might give her article the impact it needs. But when she's swept into an underwater vortex, she realizes her life...

In a room with no windows on the eastern coast of Africa, a Scotsman, James More, is held captive by jihadist fighters. Thousands of miles away in the Greenland Sea, Danielle Flinders prepares to dive in a submersible to the ocean floor. In their confines they are drawn back to the Christmas of the previous year, where a chance encounter on a beach in France led to an intense and enduring romance.