Beforetheireventualteam-upwithScoobyandthegang,brightandoptimisticDaphneandwhip-smartandanalyticalVelmaarebothmystery-solvingteenswhoarebestfriendsbuthaveonlymetonline-untilnow.DaphnehasjusttransferredtoVelmasschool,RidgeValleyHigh,anincredibletech-savvyinstitutewithallthelatestgadgetsprovidedbytheschoolsbenefactor,techbillionaireTobiasBloom.AndwhilecompetitionisfierceamongthestudentsforacovetedinternshipatBloomInnovative,DaphneandVelmadigbeyondallthegadgetsandtechtoinvestigatewhatiscausingsomeofthebrighteststudentsinschooltodisappear-onlytoemergeagaininazombie-fiedstate.