Onaclasstrip,fivefriendsarekidnappedbyanevildoomsdaycultseekingtoachieveimmortalitywithanancientpaganartifact–andwhowillstopatnothingtodoit... BerlinstudentsBen,Jonas,Leo,OzziandSophieareonaclasstriptoboringHildesheim.Theirscheduleincludesvisitingthemedievalcathedralandwitnessingacompletesolareclipse,butdestinyintervenes…Abombgoesoffatthecathedralandthestudentsareevacuatedbythepolice,onlytofindthemselvesintheclutchesofanoccultsecretsocietycallingthemselvestheLunarisCult,whoaimtouseanancientpaganartifact,theIrminsul,toharnessthevitalforceoftheirteenagecaptivesanduseitfortheirownpurposesontheeclipse.Theevilcultistsareafterimmortalityanddivinepower,andareevenpreparedtosacrificethefriends'lives. Benandhisgangmanagestoescape.Chasedfromonedangertothenext,thecultistspursuethem,closinginonthemmoreandmore.Thefanaticshaveitallplannedout,itseems,leavingnothingtochance.Theydisablethecellphonenetworksandsatelliteconnections,leavingthefriendstofendforthemselves…