Megalodon

“Danger Is Rising!”

A military vessel goes looking for an unidentified submersible and finds a giant shark waiting beneath it. Admiral King (Michael Madsen) and Captain Ivanov (Ego Mikitas) have only the weapons and gear on board, and James Thomas keeps the crew inside the ship's tight, steel spaces. The film comes down to people cut off from help, using whatever they have to survive a creature that does not care about their rank.