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PLOT----------
Nobita has been having a weird dream about a boy named Roppel and his strange companion Chami traveling in space. द्वारा a twist of fate, he met them in person where it turns out that they are real and that they were being pursued in space, causing their अंतरिक्ष vehicle to malfunction, connecting the अंतरिक्ष vehicle itself with Nobita's room. They journeyed to Roppel's planet and amidst their enjoyment, Nobita and डोरेमोन pledged to help Roppel's planet free from their oppressors.