The implied subject of introductory phrases needs to match the actual subject of the sentence.
Hatching a nefarious plan, the papers were plagiarized by the bad man.
A bread of moist and tasty texture, they devoured the loaf in seconds.
These sentences should be reworded.
Hatching a nefarious plan, the bad man plagiarized the papers.
A bread of moist and tasty texture, the loaf was devoured in seconds.
Sentences in Green are incorrect.
Worksheet on Implied vs Actual Subjects