Beforetheireventualteam-upwithScoobyandthegang,brightandoptimisticDaphneandwhip-smartandanalyticalVelmaarebothmystery-solvingteenswhoarebestfriendsbuthaveonlymetonline-untilnow.DaphnehasjusttransferredtoVelma'sschool,RidgeValleyHigh,anincredibletech-savvyinstitutewithallthelatestgadgetsprovidedbytheschool'sbenefactor,techbillionaireTobiasBloom.AndwhilecompetitionisfierceamongthestudentsforacovetedinternshipatBloomInnovative,DaphneandVelmadigbeyondallthegadgetsandtechtoinvestigatewhatiscausingsomeofthebrighteststudentsinschooltodisappear-onlytoemergeagaininazombie-fiedstate....