Big Boss invents a machine that creates rain, and uses it to pour heavy rain in the village. It rains so much that Greenit becomes flooded! The water covers all of Greenit and the animals are either stuck in the flood or floating away in the water. Luckily, thanks to Roodee's boat invention, many animals are saved.

A rumor spreads around Greenit that the magical spring water has become polluted. Due to the rumor the animals stop drinking from the magical spring water. Without drinking the water the animals of Greenit start to age and become old. Even Yoohoo and his friends begin to age and they also lose their super powers. Big Boss, who also hears this rumor, does not drink from the water either.

Within the Death Forest there is a cemetery. One day, because of Oops and Koops, the ghosts of the cemetery are awoken. Yoohoo becomes friends with the little flying squirrel ghost and introduces it to his other friends. In return, the little flying squirrel ghost wants to introduce Yoohoo to other ghost friends and takes him to meet them.