As she goes through hills and rivers looking for Melusina, a mutant and legendary mermaid from the city of Luxembourg, where she grew up, the director talks to four women about their uncertain identities: what it is like to be an immigrant without being one, and to be a Luxembourgish without being one. A journey through memory in rainy weather. A search for ever-fragmented identities. An uncertain attempt at reconciliation. The memory of emigration from a contemporary perspective of a generation with a radically different relation to territories and displacements.