Destabilized by the superiority of the Solar Twins and her captain for whom she has a big crush, Corto tries to find a technical solution to improve Maroro's power. She discovers an Aqua relic that allows her to increase the power of Oro. Despite Enki’s warnings, Corto and Oro let themselves be taken in by the power of this mysterious object… which will endanger Oro’s life but also those on the track.
