This is a fanfic.
It starts off with Henry working at his station when Joey appears and rejects his Bendy sketch. Henry is then utterly shocked, he was glad he didn't get fired though. Henry sees that all the other Bendy sketches in the Art Department are not rejected, because their mouths are kept as a smile, while some change the emotion. Henry then walks further through the studio and discovers a crowd walking up to a blocked off area called the Ink Machine Room. Night drops and the employees work hard. The next day everyone has a day off of work. Many hours later on that day, night falls and Henry gets a mail from Joey saying that he has something to show Henry.
Henry accepts this and goes to the studio. He finds out that strangely every projector is turned on. He notices the Ink Machine room is no longer blocked off. He enters the room and pulls a lever and the Ink Machine is raised. He then needs to turn it on. As he walks by, he notices an Audio Log by Wally Franks, stating that the pipes are berserk and always leaky.
Find more in Part 2.