When a blue whale tagged with a web-cam designed with stolen defense technology broadcasts a brutal murder at sea as part of a television nature program, Special Agent Tara Shores finds herself navigating an ocean of manipulation and deceit in a deadly race to reach the 100-ton creature roaming the Pacific before an unknown killer can destroy the digital evidence it carries.

As Shores dives deeper into the case, what she initially dismisses as a publicity stunt for the glitzy reality series soon sweeps her out to sea in a riptide of greed, intrigue, and high-tech crime.