Fourth Season of Digimon Adventure. 5 children receive strange messages on their cell phones that lead them to a train that takes them to the Digital World; a strange world filled with bizzare creatures called Digimon. These children have been sent there to stop an evil Digimon named Cherubimon from completely annihilating the planet of all its inhabitants. In order to accomplish this, the 5 children must locate their spirits, which will evolve them into the Legendary Warrior Digimon.