Rainbow is not enthusiastic about spending time with his grandpa while his parents are away at the store, thinking that he will be bored, but when his grandpa tells him an amazing story that hides an incredible secret, Rainbow discovers that old people can be exciting after all.

Rainbow takes up making movies, thanks to a new waterproof camera, and casts himself as Director.

Rainbow is suspicious of his sister, Ruby, when she starts acting very strangely. However, it turns out, that she is just making a surprise gift for their parents.

Rainbow and his family go on a camping trip.