Circus Tower was a ten-story building filled with circus performances featuring animatronics instead of humans. Guest was an audience member who came to watch the animatronic Nia's circus on the 10th floor as usual. However, while trying to sneak out of the restraints just before the show ended, Guest was caught by a security robot. When Guest woke up, they found themselves in a room covered in 'I love you' scribbles with a slightly ajar door, and it was already night outside. Circus Tower closes at 10 PM and is operated by an automated system, so no humans remain after that hour. In other words, I am the only human left in this Circus Tower.

Opening the door of the room where they were trapped and stepping out, Guest is greeted by the empty backstage of the circus and Circus Robots slumped over as if their power had been cut.

Robots like the Circus Robots lack the parts to speak, which creates an even more terrifying atmosphere.