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