Shadow of the dragon
Aboard an icebreaker in the Arctic Ocean a sonar operator hears an unusual noise coming from the ocean floor. She can't isolate it and chalks the event up to an anomaly in a newly installed system. Meanwhile, operatives with the Chinese Ministry of State Security are dealing with their own mystery--the disappearance of brilliant but eccentric scientist, Liu Wangshu. They're desperate to keep his crucial knowledge of aerospace and naval technology...