Beneath the surface, no one can hear you scream.

On what should be a routine rescue mission during World War II, the submarine USS Tiger Shark picks up three survivors of a U-boat attack. But for the crew-trapped together in the sub's narrow corridors and constricted spaces-the unexpected visitors seem to spark a series of chilling, otherworldly occurrences! Starring Hollywood favorites Olivia Williams (The Sixth Sense, The Postman), Bruce Greenwood (Thirteen Days, Double Jeopardy) and Matt Davis (Legally Blonde, Blue Crush).