Happy that no more demands are being made to him after his successful adventure to return sharing to LittleBigPlanet, it's all going swimmingly for Sackboy... That is, until a some kind of inter-dimensional, hyper-spatial, 1800 watt Vacuum Cleaner appears in the skies, causing quite the ruckus and sucking Sackboy up into its musty bowels. All jolly sinister and most inconvenient.
Happily, a jolly nice fellow named Larry Da Vinci intervenes and rescues him from what has come to be known as The Sucker. Da Vinci, it turns out, is in charge of "The Alliance", a semi-secret, semi-organised group devoted to fighting The Sucker before it destroys the whole Cosmos.
\o/ woot \o/