
Afterbeingship-wreckedbyanearfatalcollision,fivefriendsseekrefugeonaremoteislandinadecayingoldlighthouse.Whilesettlingintotheeeriehomeforthenight,strangenoisesandghostlyfiguresdisrupttheireffortstocommunicatetotheoutsideworldinhopesofbeingrescued.Longsuppressedsecretsoflust,unrequitedloveandjealousyboiltothesurfacestrainingtheirfriendshipsandmarriages.Anantiquediaryrevealsabrutalandbloodypast,explainingthesupernaturaleventsthatpreventthemfromescapingtheisland'scurse.Aterrifiedyoungwomanstormsinwithafrighteningwarning,"WhenShadowstakeyou,younevercomeback."Herclaimsaredismissedashysteria,untilaphantom'sviolentattackconfirmstheirdarkestfears.Now,theyallmustputasidetheirpersonalconflictsandbandtogethertodefendthemselvesagainsttheonslaughtofapproachingshadowydemons.