When terrorists capture and threaten to destroy an oil rig if they don't receive a huge ransom within 24 hours, a reclusive underwater expert must lead an elite commando team in a high-seas assault to stop them.

When terrorists capture and threaten to destroy an oil rig if they don't receive a huge ransom within 24 hours, a reclusive underwater expert must lead an elite commando team in a high-seas assault to stop them.