It is a terrible disaster! Due to a series of wrong decisions, the ferry Castor gets caught in a sea storm and sinks. The tragedy is already foreshadowed in small details: first there is an hour-long delay before departure, then some trucks are not properly secured and on the bridge there is a heated discussion between Captain Eriksen and his deputy van Damme about how to deal with the storm warning received. The captain's sudden heart attack complicates the situation. The next day, it is learned ashore that the Castor has sunk. Herwegh, the head of the commission of inquiry, then tries to find out who is morally responsible for the disaster and who the real culprits are. In the process, several human dramas unfold...