Dimitry Simonit has been hired as the night guard for a museum under construction. With so many valuable artefacts displaced, it is up to him to stop any intruders and potential thieves. Working the night shift, Dimitry hears a sound coming from one of the storage facilities, storming into the room and preparing to confront the intruder.

He sees a figure standing before him and grabs their shoulder, twisting them around. The figure was no more than a clothed mannequin, making Dimitry chuckle at the misunderstanding, unaware of the real danger lurking around the museum. The door slams shut and Dimitry can’t open it. Various artefacts and furniture begin to collapse around him. Dimitry feels something warm and slimy wrap around his throat, bringing him to his knees. Something is alive in the museum and when Dimitry realizes he’s surrounded, it’s already too late for him.

A strong urge overwhelms Sabien, driving her to lie down on her bed and masturbate. As she indulges in her self-pleasure, Sabien doesn’t realise she has left the door to her room open. Dimitry hears the moans coming from his roommate’s door and looks inside, finding Sabien lost in her pleasure, stripping her clothes off and squirming on her bed.

Aroused by what he’s found, Dimitri jerks off to Sabien without her noticing him, however things take a turn as Sabien’s self-pleasure escalates. The urge inside of her transforms Sabien. Her eyes illuminate a supernatural colour with a thick meaty cock growing out of her pants, shocking Dimitry.

Realising her roommate has witnessed her transformation, Sabien warns Dimitri to leave now before its too late. Unfortunately for Dimitri, he didn’t heed her warning, and now Sabien has reached the climax of her transformation, becoming a raging futanari that craves sexual pleasure. With Dimitri’s cock hanging out of his pants, the nymphomaniacal Sabien has the perfect prey standing right in front of her.