So when Alice's operation succeeds and she gains her sight Jules is redundant. When he's given a new (blind) owner Jules can still find no purpose in life, so he attaches himself to the closest he can find to Alice: Zibel. Due to Jules, Zibel loses his job, his accommodation, and his bearings. He must find Alice, and of course he now has a perfect excuse for searching for her.
Great literature this certainly isn't, but it's nevertheless a very readable, humorous, and undemanding read if you're in the right mood.
My other Didier van Cauwelaert post:
Didier van Cauwelaert: Un aller simple | One Way