BothAhJandSatanaremathematicgeniuses,butAhJuseshistalenttosavepeople,whileSatantokill.TheyhavebeenbattlingagainsteachotherwiththeEquationofLifeandtheEquationofChanceintheirhands.JfellintoacomainordertostopSatanfrommassacring,whichmeansthatnobodyisabletoholdSatanbackanymore.SatanusesthesuperAIcomputerAngeltogettheCloudDatabaseoftheglobalpopulationfromthecompany,Ant.WithhisEquationofChance,Satanbecomesthedeathsickleagain.ButthisisallanticipatedbyAhJbeforehelostconsciousness.HeleftaLockofHearttotemporarilygetinthewayofSatan.WhenSatanwasstuckanddidn’tknowwhattodo,hemetayoungmanwholooksexactlythesameasAhJ.Whoishe...andiftheLockofHeartcanbeunlockedsoon?