They are pursued by a dark entity who wants to use the baby's presence to cause chaos between the two worlds.
Like the rest of the series, it balances spooky Mexican folklore with slapstick humor and high-stakes action.
The story is set in the 19th century and follows two Calavera (skeleton) brothers, and Moribunda , who live in the Pueblo Calaca. Their lives change when a human baby girl unexpectedly crosses through a portal from the mortal world into the Eternal Retorno (the afterlife).
The bond between the two brothers and their protective instinct toward the human child.
The brothers decide to protect the baby and return her to the human world, but they face several obstacles:
The core of the story focuses on the "origin" of the secret society of legend-hunters and how Finado and Moribunda evolved from simple skeletons into the guardians of the portal. Key Themes
