Takes place during Sly 1. Luna the rabbit grew up with Sly, Bentley, and Murray in Happy Camper, and now that she is fully-grown, she is ready to put her skills in languages and martial arts to use and assist her friends in recovering Sly's birthright.

Eight years after the events of Sly 3, Carmelita is suddenly and savagely murdered. When Sly attempts to track down the murderer, he finds himself involved in a much grander scheme than he could have ever imagined.

While browsing through the latest fad in Japan, known as Dollars, L comes across a very odd individual that perks his curiosity and leads him to pay a visit to Ikebukuro. It is the battle between detective and informant, that you don't want to miss.