This is the first piece of (allegedly many) DLC for A World of Keflings.
This DLC adds a new chapter to the game that is selectable from the "New Game" option. You and your buff little Kefling friends somehow end up in a mysterious new sulfer filled canyon. Once you arrive you meet some friendly aliens (although the Captains deep desire to obliterate you and the Keflings isn't what I'd call friendly). You and your friends decide to help the stranded aliens repair their ship so that they can return to their planet of Yurbut.
New things to build and new resources in a small area prove to be somewhat challenging thanks to the horrible AI. Keflings will work on one resource, and when that space runs out, they SHOULD move to the next one, however, even if there is a similar resource next to them, they will not work on it. This can get annoying as you need to rack up numerous amounts of a particular resource, but the Keflings won't gather them for you.
There are also 3 new achievements, worth 50G, they are very easy to obtain, and can be acquired by playing the story.
This DLC is rather short and can be completed in 2 hours easily.