I\'m really sorry, this is the first idea I\'ve thought is truely terrible and has nothing at all to add. A story mode just would ruin the game, even adventure maps like in Minecraft wouldn\'t work, and I\'ll try to explain why.
Firstly ships aren\'t a set size or shape, designing corridoors or missions to go through would be neigh-on-impossible. A story needs a linear path, even if it is heavily-veiled in an open world (think The Elder Scrolls games), and without the ability to really define a space for the story to take part in this would be difficult. Also stories within 3D space are often difficult (which is why many space games - such as the wing commander series - just have the combat in space and everything else in GUIs). Now there are ways around these problems but it would require heavily restricting the creative element of the game, which brings me nicely to my second point.
This second point is completely my opinion, and I do expect people to deeply disagree with me on this one. This is a voxel-based game, which at it\'s heart is a creative limitless sandbox genre. Now obviously this does mean players can play the game however they like, but forcing a player down a linear path completely takes away from being able to play however you like.
Thirdly, with such a small development team, it would cost far too much time and money to put in a story mode, any other mode fine, but a story mode would be far too much work.
Finally I\'ll leave you with this thought, if you want a back story for this game, then write one, create some fan fic (I\'m not sure where you would post it on these forums but I\'m sure it could go somewhere), I\'m sure it would be greatly received, I for one would love to see some fan fic and may even give it a bit of a go myself.
tl;dr No.