Make way for the greatest adventure any bunny has ever seen. When Nano's grandfather falls mysteriously ill, the courageous grandson and his best friend Lilly must use a miniaturization machine to shrink down to micro-size and embark on a perilous journey to save him. Nano and Lilly turn to Rappel the Rabbit for help, as he's the only one who can guide the sprite-sized heroes through the confusing maze. With time ticking down, the daring trio must hop to it, and prove that you don't have to be bing to be brave.