Nobita implored Doraemon to lend him the Moshimo-box, with the intent of transforming the world into a magical realm where everyone, save Nobita, could freely harness the power of witchcraft in their daily routines. Despite his efforts to revoke the spell, Nobita learned that his mother had discarded the Moshimo-box without his knowledge. Along their journey, the group encountered a professor and his daughter, who alerted them of the impending danger posed by the treacherous "star of the Underworld." In order to safeguard their planet, they embarked on a mission to the Underworld, vowing to pierce the heart of the Underworld King. Alas, their efforts were in vain, and the group found themselves thwarted as Miyoko was taken prisoner. Undeterred, Doraemon and his companions employed the Time Machine and Dorami's Moshimo-box to restore Earth to its former glory. Alas, in a parallel universe, Miyoko remained in captivity, and the group found themselves reluctantly called back to the Underworld to vanquish their nemesis and save Miyoko from her captor's clutches.