On October 29, 2022, 159 lives were tragically lost in Itaewon, Seoul—an event that struck less than a decade after the Sewol Ferry disaster, while the wounds were still raw. How many more lives must be sacrificed before we achieve a truly safe society? The Sea Knows, produced by the Media Team of the Citizens' Countermeasure Committee for the Itaewon Tragedy, follows the journey of the victims' families, survivors, and others who carry the weight of that day over the course of a year. This journey confronts not only the evasion of responsibility by politicians and officials and the hateful remarks directed at the victims, but also something deeper. Released on the first anniversary of the tragedy, the film reveals a year marked by shared grief, comfort, and solidarity for those burdened with immeasurable sorrow. Their words and actions hold the key to creating a safer society. "If you desire safety, remember the tragedy." The film implores us to watch, to carry the memory beyond the theater, to never forget, and to build even stronger bonds of solidarity.