Yanelle and The Battle of Souls

After making peace with Meteora and her parents, Mewni began a time of peace, Moon left the throne to Star who married Marco and they had a girl, Yanelle. 15 years later, they give to Yanelle the wand, but although that moment was one of the happiest of his life, that happiness would not last much, because in the past there are still corrupt souls with the mission to destroy her family...