In the Strait of Gibraltar, a pod of six orcas launch a coordinated attack on the Céleste Mistral, a 50-foot sailing vessel – sending it to the depths.

Along the Amazon River, pink dolphins exhibit a never-before-seen behavior, forging an enigmatic bond with an ancient, isolated tribe.

On the seabed of the Clarion-Clipperton Zone – a 2.32-million-square-mile stretch of ocean between Hawaii and Mexico – a deep-sea mining operation begins harvesting billions of tons of polymetallic nodules, promising to revolutionize the extraction of precious metals.

Three seemingly unrelated events. One hidden code that binds them together.

And Sam Reilly must decipher the connection – before the balance of life on Earth is irreversibly altered forever...