MateoisacompletelynormalboywhoonenightrealizesthathemustasserthimselfasthedefenderofdreamsagainsttheNightmareKingandhisnastymachinations.Butarehisdreamsreallyjustdreams?Becauseinthemorning,creaturesfromMateo'sdreamaresuddenlyrealityandalotelsehaschanged.