In Buenos Aires, neuroscientist Lucía Blanco investigates a medical mystery: coma patient Gabriel Reyes recites another person's memories in reverse chronological order. These memories belong to Sofia Vega, a marine biologist with no connection to Gabriel. When Gabriel's brother Joaquin begins experiencing the same phenomenon, Lucía discovers a startling truth. Ten years earlier, Lucía's mentor Vera Ortiz conducted unauthorized experiments in consciousness transfer involving Sofia's mother Carmen and the Reyes brothers' uncle Kai. When the experiment spiraled out of control, Vera became an "anchor" to contain the merging consciousnesses.