Finn, Jake, and Ice King are continuing their journey through the depths of a mysterious Ice King made dungeon! When they run up against FISHO THE COLOSSAL ICE DUNGEON BOSS (she grew into the name over time, OK), will they be able to defeat her and get the treasure Ice King promised was at the end of all this? Or is Fisho just the tip of the iceberg?! Ha ha . . . Also featuring the backup story Silly String Theory !