Mercancia is an honest, in-depth look at the production of coca paste in the Magdalena Medio area of Colombia. Avoiding preconceptions and two-bit moralism, Andrea Zambelli, far from the wealthy Western destinations of the final product, gives voice to the farmers, who live a particularly hard and dangerous life in the equatorial jungle, for whom growing coca plants is their only means of survival and for whom the problem of cocaine use/abuse is not their concern.