In the aftermath of the first atomic bomb drop on Hiroshima, Japan, an elite squad of Marines are ordered to infiltrate a Nagasaki hospital. Their mission: discover the secret of a new biological weapon. With the next bomb racing their way, the team will have to remain "swift, silent, deadly," tosurvive hordes of infected locals who hunger for human flesh. But as the clock ticks down and the horrible truth of the weapon is revealed, the soldiers will be forced to decide if completing their mission is even worth the cost.