Captain Holling (Noah Beery) is relieved of command of his ship after he suffers a nervous breakdown. His replacement, Captain Downey (Boothe Howard), takes over the liner just as it is about to be used for an experiment in remote control. Professor Grimson (Ralph Lewis) has devised a system for controlling the ship from a laboratory on land. But as Grimson demonstrates the system and the special component that makes it work, a rival group is listening in, hoping to use the device for its own purposes.
