A remote alert post in the Pacific Ocean. There, tsunamis often hit the shore, sweeping away everything in their path. It is the duty of seafarers to warn people about the impending danger. They must record tremors that can trigger a tsunami, and they are the first to be in danger. Seven sailors are on duty, the peaceful course of which is interrupted by the tsunami that struck the island. There are victims — now it is necessary to warn the mainland about the impending disaster...