Here's a preview from PAX.
"The hands-on demo for
Minecraft: Story Mode at PAX has the player choose both the gender and the race of Jesse from among six available options, though the demo does lock the option to the simple overalls-wearing white male. On his way to EnderCon, Jesse loses track of his pet pig, Reuben, who is dressed in a dragon costume that has been set on fire. His best friends Axel and Olivia also help in find Reuben but Jesse is the man for the task, looking at pig tracks, finding trees burnt to a crisp, and calling out to Reuben: "All pigs but Reuben, shut up!"
[....]
"From there, the story skips several scenes to Endercon where Jesse, Petra, Axel, and Olivia are all having a fantastic time until a giant tentacle beast that looks straight from Lovecraftian hell is summoned into the sky and begins shooting tractor beams at the convention-goers. Jesse must complete several dodging action sequences, where the player must avoid pitfalls and eyebeams, grab a hold of objects as tightly as possible, and save other characters who are being sucked into the tractor beam."
See the article for the full description.
http://www.gamerevolution.com/preview/minecraft-story-mode
He concludes:
"Minecraft: Story Mode looks to be one of Teltale's strongest episodic tales yet, especially given the originality of the storyline and the serious but still playful treatment of the Minecraft world. The best part is that you don't need to know anything about Minecraft, really, to enjoy the game, though knowing Minecraft will help in all of the referential humor.
Minecraft: Story Mode will release later this year for PC, Mac, iOS, Android, Xbox 360, Xbox One, PlayStation 3, and PlayStation 4."
Didn't realize it was scheduled for later this year. Earlier than I expected.