Minecraft: Story Mode - Episode 2: Assembly Required
starts off with you back in the Nether with whichever friend you sided with. Your race to the end of the tracks will land you at either Boom Town or Redstonia.
If you choose to look for Ellegaard, then you will end up in a town of engineers looking to impress the member of the Order of the Stone in the hopes of becoming her next apprentice. Just as you walk up to Ellegaard's base, she locks herself in with the intent of making a Control Block. Players must find a way to get through the building's defenses and get to the master engineer's central lab. Of course, just because you manage to get to her doesn't mean you will easily be able to convince her to leave her experiments behind and help you.
If, on the other hand, you chose to find Magnus, you will end up in a ruin of a city that apparently really enjoys blowing things up. Just when you have a plan to find Magnus in the explosive town, you and Axel are surrounded by a bunch of hoodlums. When they take your only means of finding Magnus, you are forced to run the people down and dodge explosions. Like with Ellegaard, just because you find Magnus, doesn't mean you can just leave Boom Town in peace.
One minor point of disappointment is that you can't actually play through both of these paths in the same playthrough. Where some Telltale Games might have made this only a choice of which character you look for first, in Assembly Required, the friend you left behind decided to go out and find their choice while you were out, so if you want to experience the other half of the story, you will want to copy off your save, rewind the first episode and then choose the other option.