Plot: A deadly outbreak affects the south of the country , so that policies and health authorities sent a group of three young doctors to vaccinate people across the region and teach preventive health measures . However , during their cross a village called Aguazul , where the population is mysteriously reluctant to visit, even the doctor in charge of this town warns them not to try to vaccinate their inhabitants , but young people do not listen and heading embark that it will be the last people on your route