‘Changing Minds’ by Lawrence Herbert Tide
Jessica is a woman who receives a fantastic proposal that she can’t decline : Saving the life of her dying father by accepting that he receives a new experimental medical treatment.
The results of this medical treatment are impressive: The old man’s life is not only saved, but he’s able to quit, steady on his feet, the hospital in which he had slowly been dying during many years.
His daughter is thrilled to shelter her father at her home, as he’s searching for himself his own accomodation.
But soon, she finds that he sneaks out of her house every night…
When she furtively follows him, she discovers with dread that this miraculous treatment is hiding an ominous plot against Humanity.