The prologue section of the game is a simple job of platforming from the area you start out in, The Jollyfold (a celestial world of both stars and snow). to the Dreamtime Shrine in order to meet Shira Whidnsy. Along the way, the world becomes more detailed. Once the player gets to meet Shira, she explains that the Ocean Heart is stolen, sackboy doesn't know what the Ocean Heart is, so Shira tells him about it, and after that, she opens up the rift to Cutout Town.
the the first chapter of the game, Sackboy fells out of the rift and end up in