Municipal water towers: you've seen them all your life, but what do you really know about them? Who builds them? Who maintains them? Do the interiors ever need cleaning? Do they get cleaned? Answer: Some of them do get cleaned, sometimes. This raises more questions: What if you got a job cleaning water tanks? What if it were your first time on the job? What if you were inside the tank and the hatch on top suddenly slammed shut? What if you were trapped inside and no one knew? What if you were a Maintenance Man ... about to die ... alone ... in the dark?