Summer1910.SeveraltouristshavevanishedwhilerelaxingonthebeautifulbeachesoftheChannelCoast.InfamousinspectorsMachinandMalfoysoongatherthattheepicenterofthesemysteriousdisappearancesmustbeSlackBay,auniquesitewheretheSlackriverandtheseajoinonlyathightide.