He look like your fiancé, speaks with his voice, wears his face... but it's not him. The real Acero vanished that night, and someone else took his place. This... something is diligently pretending to be a loving partner, but its act is far from flawless. Its smile is a little too perfect, and at times, an icy, alien glint flashes in its eyes. You can feel the substitution, and it knows that you suspect something. How long can it maintain the illusion? And what kind of creature is it really?