Based on the photographs and writings of his great-grandfather, photographer and video artist Andréas Lang embarks on a search for traces and research into a lost chapter of German colonial history in Central Africa: a frontier expedition to take possession of the territory of French Congo. His photographs and videos depict places and landscapes in which the phantoms of the colonial era are still present, in a state of limbo between reality and fiction, past and present. He contrasts this with previously unpublished historical material that reflects the bleak reality of colonialism.