Thampi, a retired old man, leads an isolated life in the village and is excited for his grandson Pachu's return. He welcomes Pachu and his friends, but his happiness is short-lived.

Two travelers stop over in a small village named Santana. Unbeknownst to them, Santana is a village where, once a year, Satan comes to Earth to claim souls, and they just happened to enter the village on that day.

When Fujiko secures a file that documents the location of the fabled Columbus Egg – a mystical relic that controls the weather – she quickly recruits Lupin and the gang to track down the long-lost treasure. Unfortunately, her memory of Lupin and his friends are wiped out almost entirely. Can the gang restore Fujiko’s memory before the Egg falls into the hands of a madman?