As half the teams travel underground to find emeralds, chaos ensues when Team Ice Cube accidentally causes a giant lava spill underground. During this Book contemplates how she's been acting towards Taco. Part 2 of 2.
Once Barf Bag is filled with lava-infused barf, the effects of it starts a zombie outbreak. Two makes the contest to stay alive. Four, X and Clock temporarily leave the hotel for a trip, while all of the EXITors split up to try to escape.
Everyone is freed from the TLC and all the objects are back in the land of Goiky. Life is calm until 2 mysterious creatures offer a life-changing opportunity that they will have to battle for.
Several months after the events of BFB 16, Two allows a new contestant on the show. We catch up on the old contestants as they try to complete the first challenge, which is to get to the top of a building.
Lightning, being angry at his team, ends up destroying 7 landmarks in Goiky. Two turns this into the challenge and sends a different team out to fix each one. Meanwhile, the eliminated BFB contestants continue their journey to escape Four.
After the winner of BFB is determined, one group decides to chase down Purple Face, who has stolen the BFDI, and the other decides to go on a quest to save Four.
Barf Bag tries her best to comfort Spongy, who is still upset about the events of last episode, while the contestants dig underground to find X's buried emeralds. Part 1 of 2.