Ash and the others arrive in a town where all of the children have been disappearing. The head to the Pokemon Center to try and gather information, only to discover the Pokemon have lost all of their energy. They team up with Officer Jenny and track the source of the strange energy to a rooftop mansion, where people are using a Hypno as a sleep aid. When Misty tries it, she begins acting like a Seel and runs off into the nearby rooftop park. They then follow her to a giant pond where all the missing children are. They then decide to use Drowzee to reduce the children's condition, but Team Rocket decide to get the psychic pokemon for themselves.