Out of the past comes an immense horror. An ancient creature that must feed its voracious hunger. A massive landslide on Grand Bahama Bank sends a thirty-foot wave traveling at 150MPH toward the east coast of Florida, and the tsunami drags in something horrible from the depths of the Mid-Atlantic Ridge rift valley. Now a monster roams Florida’s east coast and its shallows, searching for prey. Matthew “Splinter” Woods lives in Sailfish Haven. He’s a washed-out Navy SEAL who lives off the grid on his dilapidated boat and has withdrawn from society rather than face his demons. But when his ex-girlfriend, charter boat captain Lenah Brisbee, comes to him for help, Splinter gets drawn into a battle that pits him against the strongest enemy he’s ever faced as he races against time to find the monster before it turns the waters he loves blood red.