Pi invents a shrink ray and wants to show it off to the others, but after a small accident, Pi, Yam Yam and Gully end up getting shrunk. The only way Pi can return them to their normal size is to use his grow ray which is back at the lab. They head back towards the lab but it’s taking them a long time as they are so small. They get stuck at the edge of the river when they meet a large beetle who offers to take them home.