Professor Kapp wants Gumby to test yet another of his experiments. In this case, it's a fluid that makes plants come to life. Prickle takes it back to Gumby's ranch, but not before pretending he's Super Dude and squirting several toy monsters. Hilarity ensues as the monsters come to life and try to kill him, but he makes it to Gumby's book in one piece. Unfortunately, it gets mixed up with some cleaning fluid, and Goo and Pokey use it to wash the car and tractor. More hilarity ensues as they come to life and it turns out that the tractor doesn't like the car very much. Their rampage about the ranch isn't stopped until the fluid is washed off. And, uh, I guess the toy monsters go on to crush the lives of hundreds of innocents.