As leader of the Israeli submarine Tekumah, Commander Gilad has the sole authority to launch nuclear-tipped cruise missiles against cities housing millions. But while out at sea, the unthinkable occurs. Devastating nuclear explosions in Israel and attacks against Israeli embassies destroy any chance of peace in the Middle East.
Following the attacks, Gilad has no way to receive orders from civilian or military authorities, and must draw on all his training to lead his men and decide how and when to retaliate. Faced with a lengthy mission, food and fuel shortages, a fire, and an attack by a surface ship, Gilad struggles to maintain order.
As tensions rise, Gilad must persuade his own officers and crew, as well as the vengeful commander of a second Israeli submarine, of the path he has chosen. Sharon, a feisty female intelligence officer onboard, staunchly supports him as well as heroic crew members who stand ready to make the ultimate sacrifice. Now, with millions of lives at stake, Gilad has some hard choices to make, ones that may very well decide the fate of the free world.