Rogelio (8) wants to unravel the mystery of death. When his parents send him off to Yucatán, he meets the Xibalba Monster, an old hermit who is sick but has made a deal with the Lords of the Underworld to remain amongst the living.
Polito is a manager in a courier office in Izamal, Yucatan, and wants to fulfill his dream of a promotion and a job in Cancun to move with his wife Teo and son.
