Tabula Rasa means 'Blank Slate', perhaps the creators of this stylish animation are referring to the empty landscape that this animation is set in.
We see a robot in a sparse, alien, post apocalyptic landscape.
The creator says that “The basic idea was to tell a simple story about the emptiness of human mind and the slavery of our own system which makes us artificial, though sometimes by sacrificing ourselves for simple and ordinary things we can make them magnificent.”
In this animation the robot sacrifices himself in order to let the plant get the sun. The small plant flourishes and becomes a ‘magnificent’ tree