From murder and espionage to terrorism and stolen submarines, a team of special agents investigates any crime that has any connection to Navy and Marine Corps personnel, regardless of rank or position.

Millions watched in horror as popular and sexy 'vlogger' Brooke Marks was murdered on-camera during one of her live webcasts. Her body was never found. But what happened in the weeks before might be the most depraved crime of all. It's a merciless wake-up call for the viral video generation.