"Hey everybody, this is BasketMC, I just died." The episode picks up right after the blast that ended the last one, and the counter reads Basket 49, Scoti 48. Now they're on opposite sides of the level.
No two-way button
One of them goes looking for a quick way across and finds a giant enchanting room and a sign: "Enjoying all the teleporters? Good. You've gained a few pounds since the last map, you should get back to some walking." There's no two-way button, so it's the long way. On the run back a sword breaks and nobody has a spare. The ghasts are still up there, along with blazes, spiders and the thorny purple-armored mobs from the mushroom level. The "safe house" isn't safe either. "I think there's harming potions in the ceiling of the safe house." Stone swords get made on the spot, and a couple of them come out with Sharpness.
At least the wool made it. "I had three and you had three."
The crater
Basket's stuff is gone. It was sitting where the TNT went off, and now it's a crater. They work out what happened: there was an orb above the ghasts, like the ones in The End, and shooting it destroyed the spawners in the ceiling but set off the TNT launchers. "So it wasn't my fault." "It's my fault all your stuff is gone, though."
A hypercharged creeper comes at them next. Then a secret: a pressure plate behind a wall, a silverfish, and a chest with replacement gear. "Oh, I get replacement boots."
"You'll thank me for this later"
The next sign is a hint, or a dare. "Would be such a shame if you had destroyed all the potion zombie spawners." One of them says not to destroy it, the other goes in anyway, and the zombie inside drops a Splash Potion of Harming, Instant Damage II. "I can't think why we would want it, but we can believe him."
Behind a wall of bookshelves is another secret, and this one is nasty. The spawner throws out experience orbs carrying harming potions. "As you get experience, they blow up." "And you can't kill them because they're experience." Chat reads "Scoti_Garbidis was killed by magic," and the counter ties at 49.
The magma cube again
Lava got loose when everything blew up, and one of them lags out and falls into it on the way back. Then a magma cube gets Scoti: "Scoti_Garbidis was slain by Magma Cube." Basket 49, Scoti 50. After that comes a hallway full of creepers and zombies. "We were pros, and then all of a sudden this hallway came up." Someone calls out, "Save me, Basket, I'm a baby bird." Back at a room with chests, the salvaged gear gets sorted into them.
Intersection 05
A lava-lined walkway leads to Intersection 05 and four signs: Death from Above, All Hell Breaks Loose, Rage-Piglet Citadel and Wildfire Cavern. "All Hell Breaks Loose. Oh, great." They end it there with the counter at Scoti 50, Basket 49. The outro is in third person. "Why, you're all diamond up, huh?" "Yeah, sorry, I didn't lose all my stuff."