The struggle over Laplace's Box spreads to Earth, where a force of Zeon remnants launches an attack on the Earth Federation capital at Dakar, spearheaded by the huge mobile armor Shamblo. Ronan Marcenas, chairman of the Federation's Council on Colony Relations, takes this event very seriously. He contacts Bright Noa, commander of the Londo Bell unit, and dispatches him to recapture the Unicorn Gundam which serves as the key to the Box. Ronan's son Riddhe is also assigned to the Ra Cailum, the flagship of Bright's unit.