David, a successful therapist, is the creator of a never-before-used method in modern psychology: a device that allows him to alter the most painful memories of his patients. His wife, Lucia, is the victim of a strange disease that will shortly end her life. The solution for David's plight appears in the shape of Sofia, a patient of David's who asks him to use his machine to rewrite her entire life.

David, un brillante terapeuta especializado en la manipulación de memorias, se enfrenta a una decisión imposible mientras su esposa se encuentra al borde de la muerte. Desesperado por salvarla, concibe un plan arriesgado: transferir su conciencia al cuerpo de una mujer inocente.