A group of young adults arrives by tour boat on a long-abandoned island, its crumbling city ruins hinting at a forgotten past. Each traveler carries a private purpose—revisiting lost homes or chasing hidden relics—yet the decaying streets soon stir forgotten memories and unexpected attractions. As night falls, unsettling occurrences begin to unsettle the group, turning their excursion into something far more dangerous. When the first bodies are discovered, it becomes clear that the island still harbors a deadly presence.