Piotr Polak, an animation artist, is trying to come up with something new for his publisher, Helena Englert, after she turned down his concept featuring a playful green dinosaur named “Diplo.” He resignedly begins erasing his work and starts over. However, within the world he’s built, that simple act of rubbing out on paper creates chaos, sending the frightened young creature scrambling to escape. Luckily, the artist…