The following isn’t fiction. Prepare for a tale of underwater politics, espionage, and treachery.

It’s the early 1970s. American and Soviet leaders debate how and if they can limit their nuke arsenal.

Despite pretenses, tensions remain high. Each side is vying for the upper hand, that scrap of intelligence that will bolster their diplomatic position.

The CIA, NSA, and Navy think they’ve found it. They believe that they’ve found a potential treasure load of information: A Soviet unencrypted communication line.