Do you know those notorius loansharks that roams in south east asia especially in Singapore and Malaysia?
This story sets in an alternate world where libraries are allowed to have violent team of retrievers who return overdued books no matter what it takes. The story happened when the library system was renewing and a precious rare book was not returned yet. So the library sent an elite macho retriever along with a newbie to get the book before time is running out.
The whole story is going to be presented in a comedic mixed with mature violent actions.