On the Ark of Men, the animals no longer exist and the vegetation is dying. To ensure survival, Men have made a pact with the Caticians, inhabitants of the nearby Ark, for food. J and O's friendship is severely tested when both are chosen the same year to submit to the rules of the Pact with the Caticians.

On the Ark of Men, the animals no longer exist and the vegetation is dying. To ensure survival, Men have made a pact with the Caticians, inhabitants of the nearby Ark, for food. J and O's friendship is severely tested when both are chosen the same year to submit to the rules of the Pact with the Caticians.