A young boy blames his sister for the damage he himself has caused when he accidentally breaks the kitchen window with his ball. Punished in her place, the little sister is very angry with her big brother.

An unpleasant feeling takes shape inside him, heavy and unwieldy, like a big elephant. As time passes, the elephant occupies more space and prevents the young boy from focusing on the various aspects of his day.

When dinner arrives, Mom has made chocolate mousse, the favorite dessert of his little sister, which she is missing out on because of him. Faced with his disappointment and this big awkward elephant of guilt, the young boy confesses his lie. As for Dad, he's not too happy, but he is still proud that his son told him the truth.