Joining a New Unit (Patreon)

A disturbance causes several officers to investigate a set of abandoned buildings, only for them to disappear.  This causes a prompt response in the form of a SWAT unit that is dispatched to find out what is going on in the building, and as one officer in particular investigates she finds herself stumbling upon the truth of the place.  The creatures that are about though have also been doing some searching and find that she is exactly what they have been looking for.