Overseas Medicines sets out to discover traditional medicines as they are practiced today in overseas regions. In these territories, where history has caused the meeting of different cultures, medicine is often multifaceted. The mixing of peoples and the confrontation of knowledge, coming from different horizons, gave birth to a very particular approach to health. With parsimony, modern medicine has begun to open some doors to traditional medicines, which locals have trusted for hundreds, even thousands of years. This documentary recounts those who fight to demonstrate the social and medical virtues of West Indian medicine based on local plants. From primary forests to the Pointe-à-Pitre University Hospital, via apothecaries' pharmacies or family gardens, the local population has always used the incredible richness of the biodiversity of the Caribbean islands to heal themselves. An ancestral knowledge revisited by the ethno-pharmacologist Emmanuel Nossin in Martinique and the doctor Henry Joseph in Guadeloupe, in an approach that respects the environment. What if the rimèd razié* of yesterday (*herbal remedies in Creole) helped invent the medicine of tomorrow?