Malý ostrov věčně utopený v mlze, nenápadný a zdánlivě bezvýznamný. V jeho nitru se však odehrává drama lásky, zrady a vraždy. Leo, vdovec a bývalý trestanec spolu se svým kumpánem pozval totiž na ostrov skupinu lidí, kteří jsou odpovědni nejen za Leovu kriminální minulost, ale zřejmě i za smrt jeho milované ženy. Pomsta však na sebe nenechá dlouho čekat a v sídle plném nastražených pastí, tajných chodeb a skrytých místností se odehraje opravdu stylově. Na tento týden nikdo z obyvatel Mlžného ostrova nadosmrti nezapomene.

Leo, a former convict, is living in seclusion on an island with his step-daughter, the daughter of his late wife. Leo was framed by a group of former business associates, and he also suspects that one of them killed his wife. He has invited the group to his island, tempting them by hinting about a hidden fortune, and he has installed a number of traps and secret passages in his home. He is aided in his efforts by a former cell-mate who holds a grudge against the same persons. When everyone arrives, the atmosphere of mutual suspicion and the thick fog that covers the island promise a tense and hazardous weekend for everyone.