In 2015, six women from La Cantera, a community in the municipality of Guanajuato, established a civil association called MAYOYE. They discovered that the water in their area was radioactive and joined forces to investigate the cause of several girls suffering from a particularly aggressive form of cancer. Their efforts led them to uncover the radioactive contamination of their water supply, which they believed contributed to the deaths of three girls within just one year. This experience transformed them from leading ordinary lives into dedicated activists.