The year is 1986, and the Cold War is at its height. Across the globe, American and Soviet submarines play a deadly game of cat and mouse, hidden deep beneath the surface of the world's oceans. Armed with enough firepower to destroy a continent, these vessels are among the remote and secure locations on the planet. They're also one of the most tempting targets imaginable for an enemy who can see the future - particularly one that wants more than anything to set off a nuclear holocaust!