ApowerfulalienthreatarrivesonEarthundermysteriouscircumstancesandBarry,IrisandtherestofTeamFlasharepushedtotheirlimitsmke6.cominadesperatebattletosavetheworld.Butwithtimerunningout,andthefateofhumanityatstake,Flashandhiscompanionswillalsoneedtoenlistthehelpofsomeoldfriendsiftheforcesofgoodaretoprevail.