The Sign of Death (Spanish: El signo de la muerte) is a 1939 Mexican film directed by Chano Urueta and starring Cantinflas and Carlos Orellana.
Gallardo (Carlos Orellana), a notable scientist and director of a museum, knows about the existence of a lost fragment of this codex.
A clumsy public library inspector (Medel) is after Cantinflas to return a book that he borrowed some time ago.
This case captures the attention of reporter couple Carlos Manzano (Tomás Perrín) and the beautiful Lola Ponce (Elena D'Orgaz).
After the body of the second victim appears in the same state as the previous one, the police are still even more confused, but Manzano suspects that there is a connection with the Aztec rites and the writings of Dr. Gallardo, starting an entire intrigue to discover who is really behind the murders.