"In the heart of an Atlantic superstorm, the Tahila fights to stay afloat. Amid the chaos, the ship’s collision-avoidance system blares a warning. Radar shows no ship. No signal. No lights. Just a strange silhouette beneath the waves. Lightning flashes – and behind one of the windows, a woman is staring out, her eyes wide with a silent plea. Braving the storm, Sam Reilly dives beneath the surface and emerges inside the structure to rescue her."