Inside the drain, Red & Yellow are playing with a marble until they see a slow, green shelled snail named Rainbow slowly approaching the two. They laugh at him while mimicking his very slow movement. However, Rainbow spits some kind of green liquid at them, causing the two to become as slow as him. To make matters worse, a car crash happens (the driver is possibly injured) and a toxic liquid gets into the drain. The toxic liquid, slowly flows towards Red, Yellow and Rainbow, as a flower gets touched by the liquid and dies, much to Red & Yellow's horror. The three then "race" away from it, Red then gets the opportunity to use his tongue to speed up, and Yellow does the same so the two manage to overtake Rainbow. They then tease the snail by blubbering their tongues at him, but unfortunately, Rainbow starts hiding in his shell and rolls up towards them, sprays the same liquid at their tongues to make it very slow, to prevent them from boosting, and rolls away, leaving Red & Yellow to be impacted by the poisonous liquid (off screen).
Epilogue[]
As the now decomposing Yellow and Red slowly walk off while getting burnt by the "toxic concoction liquid", Rainbow rolls over them and squishes them with his shell as he laughs at them.
This marks the debut of Rainbow. On afterwards, he will not be seen without his shell until Secret of Snail.
In this episode, it appears that Rainbow is able to spit out a green liquid that seems to slow down everything-being he spits it on, while also obtaining a snail-like skin.
