Sly's childhood was
very tragic. At a young age his parents were killed by a rival
group. In sly's orphanage, he met two lifelong friends, Bentley and
murray. As they grew, there thieving reputation grew with them. They
stole priceless objects from museums and such frequently. In sly one,
they took vengeance upon the group that killed his parents, the Fiendish
Five. There leader, Clockwerk survived and was reassembled in Sly 2, but
Sly and the gang took clockwerk out along with the Klaww gang, who were
working together to reassemble Clockwerk. But now Sly discovers the
existence of the Cooper Vault, where sly is supposed to collect his
inheritence. But now the vault is heavily guarded by the evil Doctor M.
To break into the Vault, Sly will need a band of high-class thieves
talented in many different fields. This could get difficult, but Sly
will go to great limits to learn more about his ancestors.