The ships of the world are under fire - attacks so sudden and vicious that most sink without even making a distress call. As navies from many nations attempt to locate the losses and find this destructive and hidden enemy, even their ships disappear without a trace.

Enter the Event Group - the most secret organization in the US government's history - a group of the brightest and best soldiers and scientists, led by Colonel Jack Collins.

They are up against the most advanced undersea vessel in history - and an insane dispensing his twisted justice to the world...