Enaldinho and his gang go out to have fun in a paradisiacal park. The class takes advantage of everything the place has to offer until strange things start to happen. Some people mysteriously disappear during the night and, when they reappear, they are different. They seem to be totally out of vital energy!  Enaldinho leaves to try to find out who or what is doing this... He then discovers that the victims are being taken to a mysterious cave and there has their energy drained, turning everyone into Zombies... Who is behind all this is  "Zap", a frightening alien who needs people's energy to be the fuel of a destructive weapon that can enslave the entire planet. Enaldinho and his friends need to prevent "Zap" from realizing his plan and saving the world from this dark force.